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NCERT Solutions for Class 12 Maths Chapter 6 Application of Derivatives are comprehensively discussed here. These NCERT solutions are created by expert team at Careers360 keeping in mind of latest syllabus of CBSE 2023-24. In the previous chapter, you have already learnt the differentiation of inverse trigonometric functions, exponential functions, logarithmic functions, composite functions, implicit functions, etc. In this article you will get NCERT Class 12 maths solutions chapter 6 with in depth explanation that will help you in understanding application of derivatives class 12.
In class 12 chapter 6 questions are based on the topics like finding the rate of change of quantities, equations of tangent, and normal on a curve at a point are covered in the application of derivatives class 12 NCERT solutions. Also, check NCERT solutions for class 12 other subjects.
Also read:
>> Definition of Derivatives: Derivatives measure the rate of change of quantities.
Rate of Change of a Quantity:
The derivative is used to find the rate of change of one quantity concerning another. For a function y = f(x), the average rate of change in the interval [a, a+h] is:
(f(a + h) - f(a)) / h
Approximation:
Derivatives help in finding approximate values of functions. The linear approximation method, proposed by Newton, involves finding the equation of the tangent line.
Linear approximation equation: L(x) = f(a) + f'(a)(x - a)
Tangents and Normals:
A tangent to a curve touches it at a single point and has a slope equal to the derivative at that point.
Slope of tangent (m) = f'(x)
The equation of the tangent line is found using: m = (y2 - y1) / (x2 - x1)
The normal to a curve is perpendicular to the tangent.
The slope of normal (n) = -1 / f'(x)
The equation of the normal line is found using: -1 / m = (y2 - y1) / (x2 - x1)
Maxima, Minima, and Point of Inflection:
Maxima and minima are peaks and valleys of a curve. The point of inflection marks a change in the curve's nature (convex to concave or vice versa).
To find maxima, minima, and points of inflection, use the first derivative test:
Find f'(c) = 0.
Check the sign change of f'(x) on the interval.
Maxima when f'(x) changes from +ve to -ve, f(c) is the maximum.
Minima when f'(x) changes from -ve to +ve, f(c) is the minimum.
Point of inflection when the sign of f'(x) doesn't change.
Increasing and Decreasing Functions:
An increasing function tends to reach the upper corner of the x-y plane, while a decreasing function tends to reach the lower corner.
For a differentiable function f(x) in the interval (a, b):
If f(x1) ≤ f(x2) when x1 < x2, it's increasing.
If f(x1) < f(x2) when x1 < x2, it's strictly increasing.
If f(x1) ≥ f(x2) when x1 < x2, it's decreasing.
If f(x1) > f(x2) when x1 < x2, it's strictly decreasing.
Free download Class 12 Maths Chapter 6 Question Answer for CBSE Exam.
NCERT class 12 maths chapter 6 question answer: Exercise - 6.1
Question:1 a) Find the rate of change of the area of a circle with respect to its radius r when
r = 3 cm
Answer:
Area of the circle (A) =
Rate of change of the area of a circle with respect to its radius r = = =
So, when r = 3, Rate of change of the area of a circle = =
Hence, Rate of change of the area of a circle with respect to its radius r when r = 3 is
Question:1 b) Find the rate of change of the area of a circle with respect to its radius r when
r = 4 cm
Answer:
Area of the circle (A) =
Rate of change of the area of a circle with respect to its radius r = = =
So, when r = 4, Rate of change of the area of a circle = =
Hence, Rate of change of the area of a circle with respect to its radius r when r = 4 is
Answer:
The volume of the cube(V) = where x is the edge length of the cube
It is given that the volume of a cube is increasing at the rate of
we can write ( By chain rule)
- (i)
Now, we know that the surface area of the cube(A) is
- (ii)
from equation (i) we know that
put this value in equation (i)
We get,
It is given in the question that the value of edge length(x) = 12cm
So,
Answer:
Radius of a circle is increasing uniformly at the rate = 3 cm/s
Area of circle(A) =
(by chain rule)
It is given that the value of r = 10 cm
So,
Hence, the rate at which the area of the circle is increasing when the radius is 10 cm is
Answer:
It is given that the rate at which edge of cube increase = 3 cm/s
The volume of cube =
(By chain rule)
It is given that the value of x is 10 cm
So,
Hence, the rate at which the volume of the cube increasing when the edge is 10 cm long is
Answer:
Given =
To find = at r = 8 cm
Area of the circle (A) =
(by chain rule)
Hence, the rate at which the area increases when the radius of the circular wave is 8 cm is
Answer:
Given =
To find = , where C is circumference
Solution :-
we know that the circumference of the circle (C) =
(by chain rule)
Hence, the rate of increase of its circumference is
Answer:
Given = Length x of a rectangle is decreasing at the rate = -5 cm/minute (-ve sign indicates decrease in rate)
the width y is increasing at the rate = 4 cm/minute
To find = and at x = 8 cm and y = 6 cm , where P is perimeter
Solution:-
Perimeter of rectangle(P) = 2(x+y)
Hence, Perimeter decreases at the rate of
Question:7(b) The length x of a rectangle is decreasing at the rate of 5 cm/minute and the width y is increasing at the rate of 4 cm/minute. When x = 8cm and y = 6cm, find the rates of change of the area of the rectangle.
Answer:
Given same as previous question
Solution:-
Area of rectangle = xy
Hence, the rate of change of area is
Answer:
Given =
To find = at r = 15 cm
Solution:-
Volume of sphere(V) =
Hence, the rate at which the radius of the balloon increases when the radius is 15 cm is
Answer:
We need to find the value of at r =10 cm
The volume of the sphere (V) =
Hence, the rate at which its volume is increasing with the radius when the later is 10 cm is
Answer:
Let h be the height of the ladder and x be the distance of the foot of the ladder from the wall
It is given that
We need to find the rate at which the height of the ladder decreases
length of ladder(L) = 5m and x = 4m (given)
By Pythagoras theorem, we can say that
Differentiate on both sides w.r.t. t
at x = 4
Hence, the rate at which the height of ladder decreases is
Answer:
We need to find the point at which
Given the equation of curve =
Differentiate both sides w.r.t. t
(required condition)
when x = 4 , and
when x = -4 , So , the coordinates are
Answer:
It is given that
We know that the shape of the air bubble is spherical
So, volume(V) =
Hence, the rate of change in volume is
Answer:
Volume of sphere(V) =
Diameter =
So, radius(r) =
Answer:
Given = and
To find = at h = 4 cm
Solution:-
Volume of cone(V) =
Question:15 The total cost C(x) in Rupees associated with the production of x units of an
item is given by
Find the marginal cost when 17 units are produced.
Answer:
Marginal cost (MC) =
Now, at x = 17
MC
Hence, marginal cost when 17 units are produced is 20.967
Question:16 The total revenue in Rupees received from the sale of x units of a product is
given by
Find the marginal revenue when x = 7
Answer:
Marginal revenue =
at x = 7
Hence, marginal revenue when x = 7 is 208
Answer:
Area of circle(A) =
Now, at r = 6cm
Hence, the rate of change of the area of a circle with respect to its radius r at r = 6 cm is
Hence, the correct answer is B
Answer:
Marginal revenue =
at x = 15
Hence, marginal revenue when x = 15 is 126
Hence, the correct answer is D
NCERT class 12 maths chapter 6 question answer: Exercise: 6.2
Question:1 . Show that the function given by f (x) = 3x + 17 is increasing on R.
Answer:
Let are two numbers in R
Hence, f is strictly increasing on R
Question:2. Show that the function given by is increasing on R.
Answer:
Let are two numbers in R
Hence, the function is strictly increasing in R
Question:3 a) Show that the function given by f (x) = is increasing in
Answer:
Given f(x) = sinx
Since,
Hence, f(x) = sinx is strictly increasing in
Question:3 b) Show that the function given by f (x) = is
Answer:
f(x) = sin x
Since, for each
So, we have
Hence, f(x) = sin x is strictly decreasing in
Question:3 c) Show that the function given by f (x) = is neither increasing nor decreasing in
Answer:
We know that sin x is strictly increasing in and strictly decreasing in
So, by this, we can say that f(x) = sinx is neither increasing or decreasing in range
Question:4(a). Find the intervals in which the function f given by is increasing
Answer:
Now,
4x - 3 = 0
So, the range is
So,
when Hence, f(x) is strictly decreasing in this range
and
when Hence, f(x) is strictly increasing in this range
Hence, is strictly increasing in
Question:4(b) Find the intervals in which the function f given by is
decreasing
Answer:
Now,
4x - 3 = 0
So, the range is
So,
when Hence, f(x) is strictly decreasing in this range
and
when Hence, f(x) is strictly increasing in this range
Hence, is strictly decreasing in
Question:5(a) Find the intervals in which the function f given by is
increasing
Answer:
It is given that
So,
x = -2 , x = 3
So, three ranges are there
Function is positive in interval and negative in the interval (-2,3)
Hence, is strictly increasing in
and strictly decreasing in the interval (-2,3)
Question:5(b) Find the intervals in which the function f given by is
decreasing
Answer:
We have
Differentiating the function with respect to x, we get :
or
When , we have :
or
So, three ranges are there
Function is positive in the interval and negative in the interval (-2,3)
So, f(x) is decreasing in (-2, 3)
Question:6(a) Find the intervals in which the following functions are strictly increasing or
decreasing:
Answer:
f(x) =
Now,
The range is from
In interval is -ve
Hence, function f(x) = is strictly decreasing in interval
In interval is +ve
Hence, function f(x) = is strictly increasing in interval
Question:6(b) Find the intervals in which the following functions are strictly increasing or
decreasing
Answer:
Given function is,
Now,
So, the range is
In interval , is +ve
Hence, is strictly increasing in the interval
In interval , is -ve
Hence, is strictly decreasing in interval
Question:6(c) Find the intervals in which the following functions are strictly increasing or
decreasing:
Answer:
Given function is,
Now,
So, the range is
In interval , is -ve
Hence, is strictly decreasing in interval
In interval (-2,-1) , is +ve
Hence, is strictly increasing in the interval (-2,-1)
Question:6(d) Find the intervals in which the following functions are strictly increasing or
decreasing:
Answer:
Given function is,
Now,
So, the range is
In interval , is +ve
Hence, is strictly increasing in interval
In interval , is -ve
Hence, is strictly decreasing in interval
Question:6(e) Find the intervals in which the following functions are strictly increasing or
decreasing:
Answer:
Given function is,
Now,
So, the intervals are
Our function is +ve in the interval
Hence, is strictly increasing in the interval
Our function is -ve in the interval
Hence, is strictly decreasing in interval
Question:7 Show that is an increasing function of x throughout its domain.
Answer:
Given function is,
Now, for , is is clear that
Hence, strictly increasing when
Question:8 Find the values of x for which is an increasing function.
Answer:
Given function is,
Now,
So, the intervals are
In interval ,
Hence, is an increasing function in the interval
Question:9 Prove that is an increasing function of
Answer:
Given function is,
Now, for
So,
Hence, is increasing function in
Question:10 Prove that the logarithmic function is increasing on
Answer:
Let logarithmic function is log x
Now, for all values of x in ,
Hence, the logarithmic function is increasing in the interval
Question:11 Prove that the function f given by is neither strictly increasing nor decreasing on (– 1, 1).
Answer:
Given function is,
Now, for interval , and for interval
Hence, by this, we can say that is neither strictly increasing nor decreasing in the interval (-1,1)
Question:12 Which of the following functions are decreasing on
Answer:
(A)
for x in
Hence, is decreasing function in
(B)
Now, as
for 2x in
Hence, is decreasing function in
(C)
Now, as
for and
Hence, it is clear that is neither increasing nor decreasing in
(D)
for x in
Hence, is strictly increasing function in the interval
So, only (A) and (B) are decreasing functions in
Answer:
(A) Given function is,
Now, in interval (0,1)
Hence, is increasing function in interval (0,1)
(B) Now, in interval
,
Hence, is increasing function in interval
(C) Now, in interval
,
Hence, is increasing function in interval
So, is increasing for all cases
Hence, correct answer is (D) None of these
Question:14 For what values of a the function f given by is increasing on
[1, 2]?
Answer:
Given function is,
Now, we can clearly see that for every value of
Hence, is increasing for every value of in the interval [1,2]
Question:15 Let I be any interval disjoint from [–1, 1]. Prove that the function f given by is increasing on I.
Answer:
Given function is,
Now,
So, intervals are from
In interval ,
Hence, is increasing in interval
In interval (-1,1) ,
Hence, is decreasing in interval (-1,1)
Hence, the function f given by is increasing on I disjoint from [–1, 1]
Question:16 Prove that the function f given by is increasing on
Given function is,
Now, we know that cot x is+ve in the interval and -ve in the interval
Hence, is increasing in the interval and decreasing in interval
Question:17 Prove that the function f given by f (x) = log |cos x| is decreasing on
and increasing on
Answer:
Given function is,
f(x) = log|cos x|
value of cos x is always +ve in both these cases
So, we can write log|cos x| = log(cos x)
Now,
We know that in interval ,
Hence, f(x) = log|cos x| is decreasing in interval
We know that in interval ,
Hence, f(x) = log|cos x| is increasing in interval
Question:18 Prove that the function given by is increasing in R.
Answer:
Given function is,
We can clearly see that for any value of x in R
Hence, is an increasing function in R
Question:19 The interval in which is increasing is
Answer:
Given function is,
Now, it is clear that only in the interval (0,2)
So, is an increasing function for the interval (0,2)
Hence, (D) is the answer
NCERT application-of-derivatives class 12 solutions: Exercise: 6.3
Question:1 . Find the slope of the tangent to the curve
Answer:
Given curve is,
Now, the slope of the tangent at point x =4 is given by
Question:2 . Find the slope of the tangent to the curve
Answer:
Given curve is,
The slope of the tangent at x = 10 is given by
at x = 10
hence, slope of tangent at x = 10 is
Question:3 Find the slope of the tangent to curve at the point whose x-coordinate is 2.
Answer:
Given curve is,
The slope of the tangent at x = 2 is given by
Hence, the slope of the tangent at point x = 2 is 11
Question:4 Find the slope of the tangent to the curve at the point whose x-coordinate is 3.
Answer:
Given curve is,
The slope of the tangent at x = 3 is given by
Hence, the slope of tangent at point x = 3 is 24
Question:5 Find the slope of the normal to the curve
Answer:
The slope of the tangent at a point on a given curve is given by
Now,
Similarly,
Hence, the slope of the tangent at is -1
Now,
Slope of normal = =
Hence, the slope of normal at is 1
Question:6 Find the slope of the normal to the curve
Answer:
The slope of the tangent at a point on given curves is given by
Now,
Similarly,
Hence, the slope of the tangent at is
Now,
Slope of normal = =
Hence, the slope of normal at is
Question:7 Find points at which the tangent to the curve is parallel to the x-axis.
Answer:
We are given :
Differentiating the equation with respect to x, we get :
or
or
It is given that tangent is parallel to the x-axis, so the slope of the tangent is equal to 0.
So,
or
Thus, Either x = -1 or x = 3
When x = -1 we get y = 12 and if x =3 we get y = -20
So the required points are (-1, 12) and (3, -20).
Answer:
Points joining the chord is (2,0) and (4,4)
Now, we know that the slope of the curve with given two points is
As it is given that the tangent is parallel to the chord, so their slopes are equal
i.e. slope of the tangent = slope of the chord
Given the equation of the curve is
Now, when
Hence, the coordinates are (3, 1)
Question:9 Find the point on the curve at which the tangent is
Answer:
We know that the equation of a line is y = mx + c
Know the given equation of tangent is
y = x - 11
So, by comparing with the standard equation we can say that the slope of the tangent (m) = 1 and value of c if -11
As we know that slope of the tangent at a point on the given curve is given by
Given the equation of curve is
When x = 2 ,
and
When x = -2 ,
Hence, the coordinates are (2,-9) and (-2,19), here (-2,19) does not satisfy the equation y=x-11
Hence, the coordinate is (2,-9) at which the tangent is
Question:10 Find the equation of all lines having slope –1 that are tangents to the curve
Answer:
We know that the slope of the tangent of at the point of the given curve is given by
Given the equation of curve is
It is given thta slope is -1
So,
Now, when x = 0 ,
and
when x = 2 ,
Hence, the coordinates are (0,-1) and (2,1)
Equation of line passing through (0,-1) and having slope = -1 is
y = mx + c
-1 = 0 X -1 + c
c = -1
Now equation of line is
y = -x -1
y + x + 1 = 0
Similarly, Equation of line passing through (2,1) and having slope = -1 is
y = mx + c
1 = -1 X 2 + c
c = 3
Now equation of line is
y = -x + 3
y + x - 3 = 0
Question:11 Find the equation of all lines having slope 2 which are tangents to the curve
Answer:
We know that the slope of the tangent of at the point of the given curve is given by
Given the equation of curve is
It is given that slope is 2
So,
So, this is not possible as our coordinates are imaginary numbers
Hence, no tangent is possible with slope 2 to the curve
Question:12 Find the equations of all lines having slope 0 which are tangent to the curve
Answer:
We know that the slope of the tangent at a point on the given curve is given by
Given the equation of the curve as
It is given thta slope is 0
So,
Now, when x = 1 ,
Hence, the coordinates are
Equation of line passing through and having slope = 0 is
y = mx + c
1/2 = 0 X 1 + c
c = 1/2
Now equation of line is
Question:13(i) Find points on the curve at which the tangents are parallel to x-axis
Answer:
Parallel to x-axis means slope of tangent is 0
We know that slope of tangent at a given point on the given curve is given by
Given the equation of the curve is
From this, we can say that
Now. when ,
Hence, the coordinates are (0,4) and (0,-4)
Question:13(ii) Find points on the curve at which the tangents are parallel to y-axis
Answer:
Parallel to y-axis means the slope of the tangent is , means the slope of normal is 0
We know that slope of the tangent at a given point on the given curve is given by
Given the equation of the curve is
Slope of normal =
From this we can say that y = 0
Now. when y = 0,
Hence, the coordinates are (3,0) and (-3,0)
Question:14(i) Find the equations of the tangent and normal to the given curves at the indicated
points:
Answer:
We know that Slope of the tangent at a point on the given curve is given by
Given the equation of the curve
at point (0,5)
Hence slope of tangent is -10
Now we know that,
Now, equation of tangent at point (0,5) with slope = -10 is
equation of tangent is
Similarly, the equation of normal at point (0,5) with slope = 1/10 is
equation of normal is
Question:14(ii) Find the equations of the tangent and normal to the given curves at the indicated
points:
Answer:
We know that Slope of tangent at a point on given curve is given by
Given equation of curve
at point (1,3)
Hence slope of tangent is 2
Now we know that,
Now, equation of tangent at point (1,3) with slope = 2 is
y = 2x + 1
y -2x = 1
Similarly, equation of normal at point (1,3) with slope = -1/2 is
y = mx + c
equation of normal is
Question:14(iii) Find the equations of the tangent and normal to the given curves at the indicated
points:
Answer:
We know that Slope of the tangent at a point on the given curve is given by
Given the equation of the curve
at point (1,1)
Hence slope of tangent is 3
Now we know that,
Now, equation of tangent at point (1,1) with slope = 3 is
equation of tangent is
Similarly, equation of normal at point (1,1) with slope = -1/3 is
y = mx + c
equation of normal is
Question:14(iv) Find the equations of the tangent and normal to the given curves at the indicated points
Answer:
We know that Slope of the tangent at a point on the given curve is given by
Given the equation of the curve
at point (0,0)
Hence slope of tangent is 0
Now we know that,
Now, equation of tangent at point (0,0) with slope = 0 is
y = 0
Similarly, equation of normal at point (0,0) with slope = is
Question:14(v) Find the equations of the tangent and normal to the given curves at the indicated points:
Answer:
We know that Slope of the tangent at a point on the given curve is given by
Given the equation of the curve
Now,
and
Now,
Hence slope of the tangent is -1
Now we know that,
Now, the equation of the tangent at the point with slope = -1 is
and
equation of the tangent at
i.e. is
Similarly, the equation of normal at with slope = 1 is
and
equation of the tangent at
i.e. is
Question:15(a) Find the equation of the tangent line to the curve which is parallel to the line
Answer:
Parellel to line means slope of tangent and slope of line is equal
We know that the equation of line is
y = mx + c
on comparing with the given equation we get slope of line m = 2 and c = 9
Now, we know that the slope of tangent at a given point to given curve is given by
Given equation of curve is
Now, when x = 2 ,
Hence, the coordinates are (2,7)
Now, equation of tangent paasing through (2,7) and with slope m = 2 is
y = mx + c
7 = 2 X 2 + c
c = 7 - 4 = 3
So,
y = 2 X x+ 3
y = 2x + 3
So, the equation of tangent is y - 2x = 3
Question:15(b) Find the equation of the tangent line to the curve which is perpendicular to the line
Answer:
Perpendicular to line means
We know that the equation of the line is
y = mx + c
on comparing with the given equation we get the slope of line m = 3 and c = 13/5
Now, we know that the slope of the tangent at a given point to given curve is given by
Given the equation of curve is
Now, when ,
Hence, the coordinates are
Now, the equation of tangent passing through (2,7) and with slope is
So,
Hence, equation of tangent is 36y + 12x = 227
Question:16 Show that the tangents to the curve at the points where x = 2 and x = – 2 are parallel .
Answer:
Slope of tangent =
When x = 2
When x = -2
Slope is equal when x= 2 and x = - 2
Hence, we can say that both the tangents to curve is parallel
Question:17 Find the points on the curve at which the slope of the tangent is equal to the y-coordinate of the point.
Answer:
Given equation of curve is
Slope of tangent =
it is given that the slope of the tangent is equal to the y-coordinate of the point
We have
So, when x = 0 , y = 0
and when x = 3 ,
Hence, the coordinates are (3,27) and (0,0)
Question:18 For the curve , find all the points at which the tangent passes
through the origin.
Answer:
Tangent passes through origin so, (x,y) = (0,0)
Given equtaion of curve is
Slope of tangent =
Now, equation of tangent is
at (0,0) Y = 0 and X = 0
and we have
Now, when x = 0,
when x = 1 ,
when x= -1 ,
Hence, the coordinates are (0,0) , (1,2) and (-1,-2)
Question:19 Find the points on the curve at which the tangents are parallel
to the x-axis.
Answer:
parellel to x-axis means slope is 0
Given equation of curve is
Slope of tangent =
When x = 1 ,
Hence, the coordinates are (1,2) and (1,-2)
Question:20 Find the equation of the normal at the point for the curve
Answer:
Given equation of curve is
Slope of tangent
at point
Now, we know that
equation of normal at point and with slope
Hence, the equation of normal is
Question:21 Find the equation of the normals to the curve which are parallel
to the line
Answer:
Equation of given curve is
Parellel to line means slope of normal and line is equal
We know that, equation of line
y= mx + c
on comparing it with our given equation. we get,
Slope of tangent =
We know that
Now, when x = 2,
and
When x = -2 ,
Hence, the coordinates are (2,18) and (-2,-6)
Now, the equation of at point (2,18) with slope
Similarly, the equation of at point (-2,-6) with slope
Hence, the equation of the normals to the curve which are parallel
to the line
are x +14y - 254 = 0 and x + 14y +86 = 0
Question:22 Find the equations of the tangent and normal to the parabola at the point
Answer:
Equation of the given curve is
Slope of tangent =
at point
Now, the equation of tangent with point and slope is
We know that
Now, the equation of at point with slope -t
Hence, the equations of the tangent and normal to the parabola
at the point are
Question:23 Prove that the curves and xy = k cut at right angles*
Answer:
Let suppose, Curve and xy = k cut at the right angle
then the slope of their tangent also cut at the right angle
means,
-(i)
Now these values in equation (i)
Hence proved
Question:24 Find the equations of the tangent and normal to the hyperbola
at the point
Answer:
Given equation is
Now ,we know that
slope of tangent =
at point
equation of tangent at point with slope
Now, divide both sides by
Hence, the equation of tangent is
We know that
equation of normal at the point with slope
Question:25 Find the equation of the tangent to the curve which is parallel to the line
Answer:
Parellel to line means the slope of tangent and slope of line is equal
We know that the equation of line is
y = mx + c
on comparing with the given equation we get the slope of line m = 2 and c = 5/2
Now, we know that the slope of the tangent at a given point to given curve is given by
Given the equation of curve is
Now, when
,
but y cannot be -ve so we take only positive value
Hence, the coordinates are
Now, equation of tangent paasing through
and with slope m = 2 is
Hence, equation of tangent paasing through and with slope m = 2 is 48x - 24y = 23
Question:26 The slope of the normal to the curve is
(A) 3 (B) 1/3 (C) –3 (D) -1/3
Answer:
Equation of the given curve is
Slope of tangent =
at x = 0
Now, we know that
Hence, (D) is the correct option
Question:27 The line is a tangent to the curve at the point
(A) (1, 2) (B) (2, 1) (C) (1, – 2) (D) (– 1, 2)
Answer:
The slope of the given line is 1
given curve equation is
If the line is tangent to the given curve than the slope of the tangent is equal to the slope of the curve
The slope of tangent =
Now, when y = 2,
Hence, the coordinates are (1,2)
Hence, (A) is the correct answer
NCERT application-of-derivatives class 12 solutions: Exercise 6.4
Question:1(i) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Lets suppose and let x = 25 and
Then,
Now, we can say that is approximate equals to dy
Now,
Hence, is approximately equals to 5.03
Question:1(ii) Using differentials, find the approximate value of each of the following up to 3 places of decimal.
Answer:
Lets suppose and let x = 49 and
Then,
Now, we can say that is approximately equal to dy
Now,
Hence, is approximately equal to 7.035
Question:1(iii) Using differentials, find the approximate value of each of the following up to 3 places of decimal.
Answer:
Lets suppose and let x = 1 and
Then,
Now, we cam say that is approximately equals to dy
Now,
Hence, is approximately equal to 0.8
Question:1(iv) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Lets suppose and let x = 0.008 and
Then,
Now, we cam say that is approximately equals to dy
Now,
Hence, is approximately equal to 0.208
Question:1(v) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Lets suppose and let x = 1 and
Then,
Now, we cam say that is approximately equals to dy
Now,
Hence, is approximately equal to 0.999 (because we need to answer up to three decimal place)
Question:1(vi) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Let's suppose and let x = 16 and
Then,
Now, we can say that is approximately equal to dy
Now,
Hence, is approximately equal to 1.969
Question:1(vii) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Lets suppose and let x = 27 and
Then,
Now, we can say that is approximately equal to dy
Now,
Hence, is approximately equal to 2.963
Question:1(viii) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Let's suppose and let x = 256 and
Then,
Now, we can say that is approximately equal to dy
Now,
Hence, is approximately equal to 3.997
Question:1(ix) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Let's suppose and let x = 81 and
Then,
Now, we can say that is approximately equal to dy
Now,
Hence, is approximately equal to 3.009
Question:1(x) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Let's suppose and let x = 400 and
Then,
Now, we can say that is approximately equal to dy
Now,
Hence, is approximately equal to 20.025
Question:1(xi) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Lets suppose and let x = 0.0036 and
Then,
Now, we can say that is approximately equal to dy
Now,
Hence, is approximately equal to 0.060 (because we need to take up to three decimal places)
Question:1(xii) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Lets suppose and let x = 27 and
Then,
Now, we cam say that is approximately equals to dy
Now,
Hence, is approximately equal to 0.060 (because we need to take up to three decimal places)
Question:1(xiii) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Lets suppose and let x = 81 and 0.5
Then,
Now, we can say that is approximately equal to dy
Now,
Hence, is approximately equal to 3.004
Question:1(xiv) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Let's suppose and let x = 4 and
Then,
Now, we can say that is approximately equal to dy
Now,
Hence, is approximately equal to 7.904
Question:1(xv) Using differentials, find the approximate value of each of the following up to 3
places of decimal.
Answer:
Lets suppose and let x = 32 and
Then,
Now, we can say that is approximately equal to dy
Now,
Hence, is approximately equal to 2.001
Question:2 Find the approximate value of f (2.01), where
Answer:
Let x = 2 and
We know that is approximately equal to dy
Hence, the approximate value of f (2.01), where is 28.21
Question:3 Find the approximate value of f (5.001), where
Answer:
Let x = 5 and
We know that is approximately equal to dy
Hence, the approximate value of f (5.001), where
Answer:
Side of cube increased by 1% = 0.01x m
Volume of cube =
we know that is approximately equal to dy
So,
Hence, the approximate change in volume V of a cube of side x metres caused by increasing the side by 1% is
Answer:
Side of cube decreased by 1% = -0.01x m
The surface area of cube =
We know that, is approximately equal to dy
Hence, the approximate change in the surface area of a cube of side x metres
caused by decreasing the side by 1%. is
Answer:
Error in radius of sphere = 0.02 m
Volume of sphere =
Error in volume
Hence, the approximate error in its volume is
Answer:
Error in radius of sphere = 0.03 m
The surface area of sphere =
Error in surface area
Hence, the approximate error in its surface area is
Question:8 If , then the approximate value of f (3.02) is
(A) 47.66 (B) 57.66 (C) 67.66 (D) 77.66
Answer:
Let x = 3 and
We know that is approximately equal to dy
Hence, the approximate value of f (3.02) is 77.66
Hence, (D) is the correct answer
Answer:
Side of cube increased by 3% = 0.03x m
The volume of cube =
we know that is approximately equal to dy
So,
Hence, the approximate change in volume V of a cube of side x metres caused by increasing the side by 3% is
Hence, (C) is the correct answer
NCERT application-of-derivatives class 12 solutions: Exercise: 6.5
Question:1(i) Find the maximum and minimum values, if any, of the following functions
given by
(
Answer:
Given function is,
Hence, minimum value occurs when
Hence, the minimum value of function occurs at
and the minimum value is
and it is clear that there is no maximum value of
Question:1(ii) Find the maximum and minimum values, if any, of the following functions
given by
Answer:
Given function is,
add and subtract 2 in given equation
Now,
for every
Hence, minimum value occurs when
Hence, the minimum value of function occurs at
and the minimum value is
and it is clear that there is no maximum value of
Question:1(iii) Find the maximum and minimum values, if any, of the following functions
given by
Answer:
Given function is,
for every
Hence, maximum value occurs when
Hence, maximum value of function occurs at x = 1
and the maximum value is
and it is clear that there is no minimum value of
Question:1(iv) Find the maximum and minimum values, if any, of the following functions
given by
Answer:
Given function is,
value of varies from
Hence, function neither has a maximum or minimum value
Question:2(i) Find the maximum and minimum values, if any, of the following functions
given by
Answer:
Given function is
Hence, minimum value occurs when |x + 2| = 0
x = -2
Hence, minimum value occurs at x = -2
and minimum value is
It is clear that there is no maximum value of the given function
Question:2(ii) Find the maximum and minimum values, if any, of the following functions
given by
Answer:
Given function is
Hence, maximum value occurs when -|x + 1| = 0
x = -1
Hence, maximum value occurs at x = -1
and maximum value is
It is clear that there is no minimum value of the given function
Question:2(iii) Find the maximum and minimum values, if any, of the following functions
given by
Answer:
Given function is
We know that value of sin 2x varies from
Hence, the maximum value of our function is 6 and the minimum value is 4
Question:2(iv) Find the maximum and minimum values, if any, of the following functions
given by
Answer:
Given function is
We know that value of sin 4x varies from
Hence, the maximum value of our function is 4 and the minimum value is 2
Question:2(v) Find the maximum and minimum values, if any, of the following functions
given by
Answer:
Given function is
It is given that the value of
So, we can not comment about either maximum or minimum value
Hence, function has neither has a maximum or minimum value
Answer:
Given function is
So, x = 0 is the only critical point of the given function
So we find it through the 2nd derivative test
Hence, by this, we can say that 0 is a point of minima
and the minimum value is
Answer:
Given function is
Hence, the critical points are 1 and - 1
Now, by second derivative test
Hence, 1 is the point of minima and the minimum value is
Hence, -1 is the point of maxima and the maximum value is
Answer:
Given function is
Now, we use the second derivative test
Hence, is the point of maxima and the maximum value is which is
Answer:
Given function is
Now, we use second derivative test
Hence, is the point of maxima and maximum value is which is
Answer:
Givrn function is
Hence 1 and 3 are critical points
Now, we use the second derivative test
Hence, x = 1 is a point of maxima and the maximum value is
Hence, x = 1 is a point of minima and the minimum value is
Answer:
Given function is
( but as we only take the positive value of x i.e. x = 2)
Hence, 2 is the only critical point
Now, we use the second derivative test
Hence, 2 is the point of minima and the minimum value is
Answer:
Gien function is
Hence., x = 0 is only critical point
Now, we use the second derivative test
Hence, 0 is the point of local maxima and the maximum value is
Question:3(viii) Find the local maxima and local minima, if any, of the following functions. Find
also the local maximum and the local minimum values, as the case may be:
Answer:
Given function is
Hence, is the only critical point
Now, we use the second derivative test
Hence, it is the point of minima and the minimum value is
Question:4(i) Prove that the following functions do not have maxima or minima:
Answer:
Given function is
But exponential can never be 0
Hence, the function does not have either maxima or minima
Question:4(ii) Prove that the following functions do not have maxima or minima:
Answer:
Given function is
Since log x deifne for positive x i.e.
Hence, by this, we can say that for any value of x
Therefore, there is no such that
Hence, the function does not have either maxima or minima
Question:4(iii) Prove that the following functions do not have maxima or minima:
Answer:
Given function is
But, it is clear that there is no such that
Hence, the function does not have either maxima or minima
Question:5(i) Find the absolute maximum value and the absolute minimum value of the following
functions in the given intervals:
Answer:
Given function is
Hence, 0 is the critical point of the function
Now, we need to see the value of the function at x = 0 and as we also need to check the value at end points of given range i.e. x = 2 and x = -2
Hence, maximum value of function occurs at x = 2 and value is 8
and minimum value of function occurs at x = -2 and value is -8
Question:5(ii) Find the absolute maximum value and the absolute minimum value of the following
functions in the given intervals:
Answer:
Given function is
as
Hence, is the critical point of the function
Now, we need to check the value of function at and at the end points of given range i.e.
Hence, the absolute maximum value of function occurs at and value is
and absolute minimum value of function occurs at and value is -1
Question:5(iii) Find the absolute maximum value and the absolute minimum value of the following
functions in the given intervals:
Answer:
Given function is
Hence, x = 4 is the critical point of function
Now, we need to check the value of function at x = 4 and at the end points of given range i.e. at x = -2 and x = 9/2
Hence, absolute maximum value of function occures at x = 4 and value is 8
and absolute minimum value of function occures at x = -2 and value is -10
Question:5(iv) Find the absolute maximum value and the absolute minimum value of the following functions in the given intervals:
Answer:
Given function is
Hence, x = 1 is the critical point of function
Now, we need to check the value of function at x = 1 and at the end points of given range i.e. at x = -3 and x = 1
Hence, absolute maximum value of function occurs at x = -3 and value is 19
and absolute minimum value of function occurs at x = 1 and value is 3
Question:6 . Find the maximum profit that a company can make, if the profit function is
given by
Answer:
Profit of the company is given by the function
x = -2 is the only critical point of the function
Now, by second derivative test
At x = -2
Hence, maxima of function occurs at x = -2 and maximum value is
Hence, the maximum profit the company can make is 113 units
Question:7 . Find both the maximum value and the minimum value of
on the interval [0, 3].
Answer:
Given function is
Now, by hit and trial let first assume x = 2
Hence, x = 2 is one value
Now,
which is not possible
Hence, x = 2 is the only critical value of function
Now, we need to check the value at x = 2 and at the end points of given range i.e. x = 0 and x = 3
Hence, maximum value of function occurs at x = 0 and vale is 25
and minimum value of function occurs at x = 2 and value is -39
Question:8 . At what points in the interval does the function attain its maximum value?
Answer:
Given function is
So, values of x are
These are the critical points of the function
Now, we need to find the value of the function at and at the end points of given range i.e. at x = 0 and
Hence, at function attains its maximum value i.e. in 1 in the given range of
Question:9 What is the maximum value of the function ?
Answer:
Given function is
Hence, is the critical point of the function
Now, we need to check the value of the function at
Value is same for all cases so let assume that n = 0
Now
Hence, the maximum value of the function is
Question:10. Find the maximum value of in the interval [1, 3]. Find the
the maximum value of the same function in [–3, –1].
Answer:
Given function is
we neglect the value x =- 2 because
Hence, x = 2 is the only critical value of function
Now, we need to check the value at x = 2 and at the end points of given range i.e. x = 1 and x = 3
Hence, maximum value of function occurs at x = 3 and vale is 89 when
Now, when
we neglect the value x = 2
Hence, x = -2 is the only critical value of function
Now, we need to check the value at x = -2 and at the end points of given range i.e. x = -1 and x = -3
Hence, the maximum value of function occurs at x = -2 and vale is 139 when
Question:11. It is given that at x = 1, the function attains its maximum value, on the interval [0, 2]. Find the value of a.
Answer:
Given function is
Function attains maximum value at x = 1 then x must one of the critical point of the given function that means
Now,
Hence, the value of a is 120
Question:12 . Find the maximum and minimum values of
Answer:
Given function is
So, values of x are
These are the critical points of the function
Now, we need to find the value of the function at and at the end points of given range i.e. at x = 0 and
Hence, at function attains its maximum value and value is in the given range of
and at x= 0 function attains its minimum value and value is 0
Question:13 . Find two numbers whose sum is 24 and whose product is as large as possible.
Answer:
Let x and y are two numbers
It is given that
x + y = 24 , y = 24 - x
and product of xy is maximum
let
Hence, x = 12 is the only critical value
Now,
at x= 12
Hence, x = 12 is the point of maxima
Noe, y = 24 - x
= 24 - 12 = 12
Hence, the value of x and y are 12 and 12 respectively
Question:14 Find two positive numbers x and y such that x + y = 60 and is maximum.
Answer:
It is given that
x + y = 60 , x = 60 -y
and is maximum
let
Now,
Now,
hence, 0 is neither point of minima or maxima
Hence, y = 45 is point of maxima
x = 60 - y
= 60 - 45 = 15
Hence, values of x and y are 15 and 45 respectively
Question:15 Find two positive numbers x and y such that their sum is 35 and the product is a maximum.
Answer:
It is given that
x + y = 35 , x = 35 - y
and is maximum
Therefore,
Now,
Now,
Hence, y = 35 is the point of minima
Hence, y= 0 is neither point of maxima or minima
Hence, y = 25 is the point of maxima
x = 35 - y
= 35 - 25 = 10
Hence, the value of x and y are 10 and 25 respectively
Question:16 . Find two positive numbers whose sum is 16 and the sum of whose cubes is minimum.
Answer:
let x an d y are positive two numbers
It is given that
x + y = 16 , y = 16 - x
and is minimum
Now,
Hence, x = 8 is the only critical point
Now,
Hence, x = 8 is the point of minima
y = 16 - x
= 16 - 8 = 8
Hence, values of x and y are 8 and 8 respectively
Answer:
It is given that the side of the square is 18 cm
Let assume that the length of the side of the square to be cut off is x cm
So, by this, we can say that the breath of cube is (18-2x) cm and height is x cm
Then,
Volume of cube =
But the value of x can not be 9 because then the value of breath become 0 so we neglect value x = 9
Hence, x = 3 is the critical point
Now,
Hence, x = 3 is the point of maxima
Hence, the length of the side of the square to be cut off is 3 cm so that the volume of the box is the maximum possible
Answer:
It is given that the sides of the rectangle are 45 cm and 24 cm
Let assume the side of the square to be cut off is x cm
Then,
Volume of cube
But x cannot be equal to 18 because then side (24 - 2x) become negative which is not possible so we neglect value x= 18
Hence, x = 5 is the critical value
Now,
Hence, x = 5 is the point of maxima
Hence, the side of the square to be cut off is 5 cm so that the volume of the box is maximum
Question:19 Show that of all the rectangles inscribed in a given fixed circle, the square has the maximum area.
Answer:
Let assume that length and breadth of rectangle inscribed in a circle is l and b respectively
and the radius of the circle is r
Now, by Pythagoras theorem
a = 2r
Now, area of reactangle(A) = l b
Now,
Hence, is the point of maxima
Since, l = b we can say that the given rectangle is a square
Hence, of all the rectangles inscribed in a given fixed circle, the square has the maximum area
Answer:
Let r be the radius of the base of cylinder and h be the height of the cylinder
we know that the surface area of the cylinder
Volume of cylinder
Hence, is the critical point
Now,
Hence, is the point of maxima
Hence, the right circular cylinder of given surface and maximum volume is such that its height is equal to the diameter(D = 2r) of the base
Answer:
Let r be the radius of base and h be the height of the cylinder
The volume of the cube (V) =
It is given that the volume of cylinder = 100
Surface area of cube(A) =
Hence, is the critical point
Hence, is the point of minima
Hence, and are the dimensions of the can which has the minimum surface area
Answer:
Area of the square (A) =
Area of the circle(S) =
Given the length of wire = 28 m
Let the length of one of the piece is x m
Then the length of the other piece is (28 - x) m
Now,
and
Area of the combined circle and square = A + S
Now,
Hence, is the point of minima
Other length is = 28 - x
=
Hence, two lengths are and
Answer:
Volume of cone (V) =
Volume of sphere with radius r =
By pythagoras theorem in we ca say that
V =
Now,
Hence, point is the point of maxima
Hence, the altitude of the right circular cone of maximum volume that can be inscribed in a sphere of radius r is
Volume =
Hence proved
Answer:
Volume of cone(V)
curved surface area(A) =
Now , we can clearly varify that
when
Hence, is the point of minima
Hence proved that the right circular cone of least curved surface and given volume has an altitude equal to time the radius of the base
Question:25 Show that the semi-vertical angle of the cone of the maximum volume and of given slant height is
Answer:
Let a be the semi-vertical angle of cone
Let r , h , l are the radius , height , slent height of cone
Now,
we know that
Volume of cone (V) =
Now,
Now,
Now, at
Therefore, is the point of maxima
Hence proved
Question:26 Show that semi-vertical angle of the right circular cone of given surface area and maximum volume is
Answer:
Let r, l, and h are the radius, slant height and height of cone respectively
Now,
Now,
we know that
The surface area of the cone (A) =
Now,
Volume of cone(V) =
On differentiate it w.r.t to a and after that
we will get
Now, at
Hence, we can say that is the point if maxima
Hence proved
Question:27 The point on the curve which is nearest to the point (0, 5) is
Answer:
Given curve is
Let the points on curve be
Distance between two points is given by
Hence, x = 0 is the point of maxima
Hence, the point is the point of minima
Hence, the point is the point on the curve which is nearest to the point (0, 5)
Hence, the correct answer is (A)
Question:28 For all real values of x, the minimum value of
is
(A) 0 (B) 1 (C) 3 (D) 1/3
Answer:
Given function is
Hence, x = 1 and x = -1 are the critical points
Now,
Hence, x = 1 is the point of minima and the minimum value is
Hence, x = -1 is the point of maxima
Hence, the minimum value of
is
Hence, (D) is the correct answer
Question:29 The maximum value of
Answer:
Given function is
Hence, x = 1/2 is the critical point s0 we need to check the value at x = 1/2 and at the end points of given range i.e. at x = 1 and x = 0
Hence, by this we can say that maximum value of given function is 1 at x = 0 and x = 1
option c is correct
Application-of-derivatives class 12 NCERT solutions - Miscellaneous Exercise
Question:1(a) Using differentials, find the approximate value of each of the following:
Answer:
Let and
Now, we know that is approximate equals to dy
So,
Now,
Hence, is approximately equal to 0.677
Question:1(b) Using differentials, find the approximate value of each of the following:
Answer:
Let and
Now, we know that is approximately equals to dy
So,
Now,
Hence, is approximately equals to 0.497
Question:2. Show that the function given by has maximum at x = e.
Answer:
Given function is
Hence, x =e is the critical point
Now,
Hence, x = e is the point of maxima
Answer:
It is given that the base of the triangle is b
and let the side of the triangle be x cm ,
We know that the area of the triangle(A) =
now,
Now at x = b
Hence, the area decreasing when the two equal sides are equal to the base is
Question:4 Find the equation of the normal to curve which passes through the point (1, 2).
Answer:
Given the equation of the curve
We know that the slope of the tangent at a point on the given curve is given by
We know that
At point (a,b)
Now, the equation of normal with point (a,b) and
It is given that it also passes through the point (1,2)
Therefore,
-(i)
It also satisfies equation -(ii)
By comparing equation (i) and (ii)
Now, equation of normal with point (2,1) and slope = -1
Hence, equation of normal is x + y - 3 = 0
Question:5 . Show that the normal at any point to the curve is at a constant distance from the origin.
Answer:
We know that the slope of tangent at any point is given by
Given equations are
We know that
equation of normal with given points and slope
Hence, the equation of normal is
Now perpendicular distance of normal from the origin (0,0) is
Hence, by this, we can say that
the normal at any point to the curve
is at a constant distance from the origin
Question:6(i) Find the intervals in which the function f given by is
Answer:
Given function is
But
So,
Now three ranges are there
In interval ,
Hence, the given function is increasing in the interval
in interval so function is decreasing in this inter
Question:6(ii) Find the intervals in which the function f given by f x is equal to
Answer:
Given function is
But
So,
Now three ranges are there
In interval ,
Hence, given function is increasing in interval
in interval
Hence, given function is decreasing in interval
Question:7(i) Find the intervals in which the function f given by
Answer:
Given function is
Hence, three intervals are their
In interval
Hence, given function is increasing in interval
In interval (-1,1) ,
Hence, given function is decreasing in interval (-1,1)
Question:7(ii) Find the intervals in which the function f given by
Answer:
Given function is
Hence, three intervals are their
In interval
Hence, given function is increasing in interval
In interval (-1,1) ,
Hence, given function is decreasing in interval (-1,1)
Answer:
Given the equation of the ellipse
Now, we know that ellipse is symmetrical about x and y-axis. Therefore, let's assume coordinates of A = (-n,m) then,
Now,
Put(-n,m) in equation of ellipse
we will get
Therefore, Now
Coordinates of A =
Coordinates of B =
Now,
Length AB(base) =
And height of triangle ABC = (a+n)
Now,
Area of triangle =
Now,
Now,
but n cannot be zero
therefore,
Now, at
Therefore, is the point of maxima
Now,
Now,
Therefore, Area (A)
Answer:
Let l , b and h are length , breath and height of tank
Then, volume of tank = l X b X h = 8
h = 2m (given)
lb = 4 =
Now,
area of base of tank = l X b = 4
area of 4 side walls of tank = hl + hl + hb + hb = 2h(l + b)
Total area of tank (A) = 4 + 2h(l + b)
Now,
Hence, b = 2 is the point of minima
So, l = 2 , b = 2 and h = 2 m
Area of base = l X B = 2 X 2 =
building of tank costs Rs 70 per sq metres for the base
Therefore, for Rs = 4 X 70 = 280 Rs
Area of 4 side walls = 2h(l + b)
= 2 X 2(2 + 2) =
building of tank costs Rs 45 per square metre for sides
Therefore, for Rs = 16 X 45 = 720 Rs
Therefore, total cost for making the tank is = 720 + 280 = 1000 Rs
Answer:
It is given that
the sum of the perimeter of a circle and square is k =
Let the sum of the area of a circle and square(A) =
Now,
Hence, is the point of minima
Hence proved that the sum of their areas is least when the side of the square is double the radius of the circle
Answer:
Let l and bare the length and breadth of rectangle respectively and r will be the radius of circle
The total perimeter of window = perimeter of rectangle + perimeter of the semicircle
=
Area of window id given by (A) =
Now,
Hence, b = 5/2 is the point of maxima
Hence, these are the dimensions of the window to admit maximum light through the whole opening
Question:12 A point on the hypotenuse of a triangle is at distance a and b from the sides of the triangle. Show that the minimum length of the hypotenuse is
Answer:
It is given that
A point on the hypotenuse of a triangle is at a distance a and b from the sides of the triangle
Let the angle between AC and BC is
So, the angle between AD and ED is also
Now,
CD =
And
AD =
AC = H = AD + CD
= +
Now,
When
Hence, is the point of minima
and
AC = =
Hence proved
Question:13 Find the points at which the function f given by has (i) local maxima (ii) local minima (iii) point of inflexion
Answer:
Given function is
Now, for value x close to and to the left of , ,and for value close to and to the right of
Thus, point x = is the point of maxima
Now, for value x close to 2 and to the Right of 2 , ,and for value close to 2 and to the left of 2
Thus, point x = 2 is the point of minima
There is no change in the sign when the value of x is -1
Thus x = -1 is the point of inflexion
Question:14 Find the absolute maximum and minimum values of the function f given by
Answer: Given function is
Now,
Hence, the point is the point of maxima and the maximum value is
And
Hence, the point is the point of minima and the minimum value is
Answer:
The volume of a cone (V) =
The volume of the sphere with radius r =
By Pythagoras theorem in we ca say that
V =
Now,
Hence, the point is the point of maxima
Hence, the altitude of the right circular cone of maximum volume that can be inscribed in a sphere of radius r is
Answer:
Let's do this question by taking an example
suppose
Now, also
Hence by this, we can say that f is an increasing function on (a, b)
Question:17 Show that the height of the cylinder of maximum volume that can be inscribed in a sphere of radius R is . Also, find the maximum volume.
Answer:
The volume of the cylinder (V) =
By Pythagoras theorem in
h = 2OA
Now,
Hence, the point is the point of maxima
Hence, the height of the cylinder of maximum volume that can be inscribed in a sphere of radius R is
and maximum volume is
Answer:
Let's take radius and height of cylinder = r and h ' respectively
Let's take radius and height of cone = R and h respectively
Volume of cylinder =
Volume of cone =
Now, we have
Now, since are similar
Now,
Now,
Now,
at
Hence, is the point of maxima
Hence proved
Now, Volume (V) at and is
hence proved
Answer:
It is given that
Volume of cylinder (V) =
Hence, (A) is correct answer
Question:20 The slope of the tangent to the curve at the point
(2,– 1) is
Answer:
Given curves are
At point (2,-1)
Similarly,
The common value between two is t = 2
Hence, we find the slope of the tangent at t = 2
We know that the slope of the tangent at a given point is given by
Hence, (B) is the correct answer
Question:21 The line y is equal to is a tangent to the curve if the value of m is
(A) 1
Answer:
Standard equation of the straight line
y = mx + c
Where m is lope and c is constant
By comparing it with equation , y = mx + 1
We find that m is the slope
Now,
we know that the slope of the tangent at a given point on the curve is given by
Given the equation of the curve is
Put this value of m in the given equation
Hence, value of m is 1
Hence, (A) is correct answer
Question:22 T he normal at the point (1,1) on the curve is
(A) x + y = 0
Answer:
Given the equation of the curve
We know that the slope of the tangent at a point on the given curve is given by
We know that
At point (1,1)
Now, the equation of normal with point (1,1) and slope = 1
Hence, the correct answer is (B)
Question:23 The normal to the curve passing (1,2) is
Answer:
Given the equation of the curve
We know that the slope of the tangent at a point on the given curve is given by
We know that
At point (a,b)
Now, the equation of normal with point (a,b) and
?
It is given that it also passes through the point (1,2)
Therefore,
-(i)
It also satisfies equation -(ii)
By comparing equation (i) and (ii)
Now, equation of normal with point (2,1) and slope = -1
Hence, correct answer is (A)
Question:24 The points on the curve , where the normal to the curve makes equal intercepts with the axes are
Answer:
Given the equation of the curve
We know that the slope of the tangent at a point on a given curve is given by
We know that
At point (a,b)
Now, the equation of normal with point (a,b) and
It is given that normal to the curve makes equal intercepts with the axes
Therefore,
point(a,b) also satisfy the given equation of the curve
Hence, The points on the curve , where the normal to the curve makes equal intercepts with the axes are
Hence, the correct answer is (A)
If you are looking for application of derivatives class 12 ncert solution of exercises then they are listed below.
If you are good at differentiation, NCERT Class 12 maths chapter 6 alone has 11% weightage in 12 board final examinations, which means you can score very easily with basic knowledge of maths and basic differentiation. After going through class 12 maths ch 6, you can build your concepts to score well in exams.
Class 12 maths chapter 6 seems to be very easy but there are chances of silly mistakes as it requires knowledge of other chapters also. So, practice all the NCERT questions on your own, you can take help of these NCERT solutions for class 12 maths chapter 6 application of derivatives. There are five exercises with 102 questions in chapter 6 class 12 maths. All these questions are explained in this Class 12 maths chapter 6 NCERT solutions article.
Also read,
What is the derivative?
The derivative is the rate of change of distance(S) with respect to the time(t). In a similar manner, whenever one quantity (y) varies with another quantity (x), and also satisfy ,then or represents the rate of change of y with respect to x and or represents the rate of change of y with respect to x at . Let's take an example of a derivative
Example- Find the rate of change of the area of a circle per second with respect to its radius r when r = 5 cm. Solution- The area A of a circle with radius r is given by . Therefore, the rate of change of the area (A) with respect to its radius(r) is given by - When Thus, the area of the circle is changing at the rate of |
6.1 Introduction
6.2 Rate of Change of Quantities
6.3 Increasing and Decreasing Functions
6.4 Tangents and Normals
6.5 Approximations
6.6 Maxima and Minima
6.6.1 Maximum and Minimum Values of a Function in a Closed Interval
NCERT Solutions for Class 12 maths chapter 6 PDFs are very helpful for the preparation of this chapter. Here are some tips to get command on this application of derivatives solutions.
First cover the differentials and then go for its applications.
Solve the NCERT problems first with examples, NCERT Solutions for Class 12 maths chapter 6 PDF will help in this.
Try to make figures first and label it, if required. This will help in solving the problem easily.
NCERT maths chapter 6 class 12 solutions outlines the crucial uses of derivatives. The NCERT Solutions for Class 12 Maths Chapter 6 covers concepts such as utilizing derivatives to calculate the rate of change of quantities, determining ranges, and finding the equation of tangent and normal lines to a curve at a particular point. The ultimate goal of these solutions is to encourage students to practice and enhance their mathematical skills, aiding their overall academic progress.
you can directly download by clicking on the given link NCERT solutions for class 12 Maths. you can also get these solutions freely from careers360 official website. these solutions are make you comfortable with applications of derivative's problems and build your confidence that help you in exam to score well.
maths chapter 6 class 12 ncert solutions includes six main topics and a miscellaneous section with questions and answers at the end. The topics covered in this chapter are:
6.1 - Introduction
6.2 - Rate of Change of Quantities
6.3 - Increasing and Decreasing Functions
6.4 - Tangents and Normals
6.5 - Approximations
6.6 - Maxima and Minima
ch 6 maths class 12 ncert solutions are very important to get good hold in these topics.
Application of derivatives has 11% weightage in the CBSE 12th board final exam. Having good weightage this chapter become more important for board as well as some premiere exams like JEE Main and JEE Advance. Therefor it is advise to students to make good hold on the concepts of this chapter.
There are several compelling reasons to get the maths chapter 6 class 12 ncert solutions, created by the specialists at Careers360. Firstly, the CBSE board suggests students consult the NCERT textbooks, as they are among the top study resources for exams. Secondly, chapter 6 class 12 maths ncert solutions serve a critical function as all the answers to the questions in the NCERT textbook can be found in one location. Finally, the subject experts and teachers at Careers360 present these class 12 maths ch 6 question answer in a succinct way to aid students in achieving high marks in their board exams.
hello,
Yes you can appear for the compartment paper again since CBSE gives three chances to a candidate to clear his/her exams so you still have two more attempts. However, you can appear for your improvement paper for all subjects but you cannot appear for the ones in which you have failed.
I hope this was helpful!
Good Luck
Hello dear,
If you was not able to clear 1st compartment and now you giving second compartment so YES, you can go for your improvement exam next year but if a student receives an improvement, they are given the opportunity to retake the boards as a private candidate the following year, but there are some requirements. First, the student must pass all of their subjects; if they received a compartment in any subject, they must then pass the compartment exam before being eligible for the improvement.
As you can registered yourself as private candidate for giving your improvement exam of 12 standard CBSE(Central Board of Secondary Education).For that you have to wait for a whole year which is bit difficult for you.
Positive side of waiting for whole year is you have a whole year to preparing yourself for your examination. You have no distraction or something which may causes your failure in the exams. In whole year you have to stay focused on your 12 standard examination for doing well in it. By this you get a highest marks as a comparison of others.
Believe in Yourself! You can make anything happen
All the very best.
Hello Student,
I appreciate your Interest in education. See the improvement is not restricted to one subject or multiple subjects and we cannot say if improvement in one subject in one year leads to improvement in more subjects in coming year.
You just need to have a revision of all subjects what you have completed in the school. have a revision and practice of subjects and concepts helps you better.
All the best.
If you'll do hard work then by hard work of 6 months you can achieve your goal but you have to start studying for it dont waste your time its a very important year so please dont waste it otherwise you'll regret.
Yes, you can take admission in class 12th privately there are many colleges in which you can give 12th privately.
The field of biomedical engineering opens up a universe of expert chances. An Individual in the biomedical engineering career path work in the field of engineering as well as medicine, in order to find out solutions to common problems of the two fields. The biomedical engineering job opportunities are to collaborate with doctors and researchers to develop medical systems, equipment, or devices that can solve clinical problems. Here we will be discussing jobs after biomedical engineering, how to get a job in biomedical engineering, biomedical engineering scope, and salary.
Database professionals use software to store and organise data such as financial information, and customer shipping records. Individuals who opt for a career as data administrators ensure that data is available for users and secured from unauthorised sales. DB administrators may work in various types of industries. It may involve computer systems design, service firms, insurance companies, banks and hospitals.
A career as ethical hacker involves various challenges and provides lucrative opportunities in the digital era where every giant business and startup owns its cyberspace on the world wide web. Individuals in the ethical hacker career path try to find the vulnerabilities in the cyber system to get its authority. If he or she succeeds in it then he or she gets its illegal authority. Individuals in the ethical hacker career path then steal information or delete the file that could affect the business, functioning, or services of the organization.
The invention of the database has given fresh breath to the people involved in the data analytics career path. Analysis refers to splitting up a whole into its individual components for individual analysis. Data analysis is a method through which raw data are processed and transformed into information that would be beneficial for user strategic thinking.
Data are collected and examined to respond to questions, evaluate hypotheses or contradict theories. It is a tool for analyzing, transforming, modeling, and arranging data with useful knowledge, to assist in decision-making and methods, encompassing various strategies, and is used in different fields of business, research, and social science.
Individuals who opt for a career as geothermal engineers are the professionals involved in the processing of geothermal energy. The responsibilities of geothermal engineers may vary depending on the workplace location. Those who work in fields design facilities to process and distribute geothermal energy. They oversee the functioning of machinery used in the field.
Individuals who opt for a career as a remote sensing technician possess unique personalities. Remote sensing analysts seem to be rational human beings, they are strong, independent, persistent, sincere, realistic and resourceful. Some of them are analytical as well, which means they are intelligent, introspective and inquisitive.
Remote sensing scientists use remote sensing technology to support scientists in fields such as community planning, flight planning or the management of natural resources. Analysing data collected from aircraft, satellites or ground-based platforms using statistical analysis software, image analysis software or Geographic Information Systems (GIS) is a significant part of their work. Do you want to learn how to become remote sensing technician? There's no need to be concerned; we've devised a simple remote sensing technician career path for you. Scroll through the pages and read.
The role of geotechnical engineer starts with reviewing the projects needed to define the required material properties. The work responsibilities are followed by a site investigation of rock, soil, fault distribution and bedrock properties on and below an area of interest. The investigation is aimed to improve the ground engineering design and determine their engineering properties that include how they will interact with, on or in a proposed construction.
The role of geotechnical engineer in mining includes designing and determining the type of foundations, earthworks, and or pavement subgrades required for the intended man-made structures to be made. Geotechnical engineering jobs are involved in earthen and concrete dam construction projects, working under a range of normal and extreme loading conditions.
How fascinating it is to represent the whole world on just a piece of paper or a sphere. With the help of maps, we are able to represent the real world on a much smaller scale. Individuals who opt for a career as a cartographer are those who make maps. But, cartography is not just limited to maps, it is about a mixture of art, science, and technology. As a cartographer, not only you will create maps but use various geodetic surveys and remote sensing systems to measure, analyse, and create different maps for political, cultural or educational purposes.
Budget analysis, in a nutshell, entails thoroughly analyzing the details of a financial budget. The budget analysis aims to better understand and manage revenue. Budget analysts assist in the achievement of financial targets, the preservation of profitability, and the pursuit of long-term growth for a business. Budget analysts generally have a bachelor's degree in accounting, finance, economics, or a closely related field. Knowledge of Financial Management is of prime importance in this career.
The invention of the database has given fresh breath to the people involved in the data analytics career path. Analysis refers to splitting up a whole into its individual components for individual analysis. Data analysis is a method through which raw data are processed and transformed into information that would be beneficial for user strategic thinking.
Data are collected and examined to respond to questions, evaluate hypotheses or contradict theories. It is a tool for analyzing, transforming, modeling, and arranging data with useful knowledge, to assist in decision-making and methods, encompassing various strategies, and is used in different fields of business, research, and social science.
A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.
An underwriter is a person who assesses and evaluates the risk of insurance in his or her field like mortgage, loan, health policy, investment, and so on and so forth. The underwriter career path does involve risks as analysing the risks means finding out if there is a way for the insurance underwriter jobs to recover the money from its clients. If the risk turns out to be too much for the company then in the future it is an underwriter who will be held accountable for it. Therefore, one must carry out his or her job with a lot of attention and diligence.
Individuals in the operations manager jobs are responsible for ensuring the efficiency of each department to acquire its optimal goal. They plan the use of resources and distribution of materials. The operations manager's job description includes managing budgets, negotiating contracts, and performing administrative tasks.
An investment director is a person who helps corporations and individuals manage their finances. They can help them develop a strategy to achieve their goals, including paying off debts and investing in the future. In addition, he or she can help individuals make informed decisions.
Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues.
A career as Transportation Planner requires technical application of science and technology in engineering, particularly the concepts, equipment and technologies involved in the production of products and services. In fields like land use, infrastructure review, ecological standards and street design, he or she considers issues of health, environment and performance. A Transportation Planner assigns resources for implementing and designing programmes. He or she is responsible for assessing needs, preparing plans and forecasts and compliance with regulations.
An expert in plumbing is aware of building regulations and safety standards and works to make sure these standards are upheld. Testing pipes for leakage using air pressure and other gauges, and also the ability to construct new pipe systems by cutting, fitting, measuring and threading pipes are some of the other more involved aspects of plumbing. Individuals in the plumber career path are self-employed or work for a small business employing less than ten people, though some might find working for larger entities or the government more desirable.
Individuals who opt for a career as construction managers have a senior-level management role offered in construction firms. Responsibilities in the construction management career path are assigning tasks to workers, inspecting their work, and coordinating with other professionals including architects, subcontractors, and building services engineers.
Urban Planning careers revolve around the idea of developing a plan to use the land optimally, without affecting the environment. Urban planning jobs are offered to those candidates who are skilled in making the right use of land to distribute the growing population, to create various communities.
Urban planning careers come with the opportunity to make changes to the existing cities and towns. They identify various community needs and make short and long-term plans accordingly.
Highway Engineer Job Description: A Highway Engineer is a civil engineer who specialises in planning and building thousands of miles of roads that support connectivity and allow transportation across the country. He or she ensures that traffic management schemes are effectively planned concerning economic sustainability and successful implementation.
Individuals who opt for a career as an environmental engineer are construction professionals who utilise the skills and knowledge of biology, soil science, chemistry and the concept of engineering to design and develop projects that serve as solutions to various environmental problems.
A Naval Architect is a professional who designs, produces and repairs safe and sea-worthy surfaces or underwater structures. A Naval Architect stays involved in creating and designing ships, ferries, submarines and yachts with implementation of various principles such as gravity, ideal hull form, buoyancy and stability.
Orthotists and Prosthetists are professionals who provide aid to patients with disabilities. They fix them to artificial limbs (prosthetics) and help them to regain stability. There are times when people lose their limbs in an accident. In some other occasions, they are born without a limb or orthopaedic impairment. Orthotists and prosthetists play a crucial role in their lives with fixing them to assistive devices and provide mobility.
A career in pathology in India is filled with several responsibilities as it is a medical branch and affects human lives. The demand for pathologists has been increasing over the past few years as people are getting more aware of different diseases. Not only that, but an increase in population and lifestyle changes have also contributed to the increase in a pathologist’s demand. The pathology careers provide an extremely huge number of opportunities and if you want to be a part of the medical field you can consider being a pathologist. If you want to know more about a career in pathology in India then continue reading this article.
Gynaecology can be defined as the study of the female body. The job outlook for gynaecology is excellent since there is evergreen demand for one because of their responsibility of dealing with not only women’s health but also fertility and pregnancy issues. Although most women prefer to have a women obstetrician gynaecologist as their doctor, men also explore a career as a gynaecologist and there are ample amounts of male doctors in the field who are gynaecologists and aid women during delivery and childbirth.
An oncologist is a specialised doctor responsible for providing medical care to patients diagnosed with cancer. He or she uses several therapies to control the cancer and its effect on the human body such as chemotherapy, immunotherapy, radiation therapy and biopsy. An oncologist designs a treatment plan based on a pathology report after diagnosing the type of cancer and where it is spreading inside the body.
The audiologist career involves audiology professionals who are responsible to treat hearing loss and proactively preventing the relevant damage. Individuals who opt for a career as an audiologist use various testing strategies with the aim to determine if someone has a normal sensitivity to sounds or not. After the identification of hearing loss, a hearing doctor is required to determine which sections of the hearing are affected, to what extent they are affected, and where the wound causing the hearing loss is found. As soon as the hearing loss is identified, the patients are provided with recommendations for interventions and rehabilitation such as hearing aids, cochlear implants, and appropriate medical referrals. While audiology is a branch of science that studies and researches hearing, balance, and related disorders.
The hospital Administrator is in charge of organising and supervising the daily operations of medical services and facilities. This organising includes managing of organisation’s staff and its members in service, budgets, service reports, departmental reporting and taking reminders of patient care and services.
For an individual who opts for a career as an actor, the primary responsibility is to completely speak to the character he or she is playing and to persuade the crowd that the character is genuine by connecting with them and bringing them into the story. This applies to significant roles and littler parts, as all roles join to make an effective creation. Here in this article, we will discuss how to become an actor in India, actor exams, actor salary in India, and actor jobs.
Individuals who opt for a career as acrobats create and direct original routines for themselves, in addition to developing interpretations of existing routines. The work of circus acrobats can be seen in a variety of performance settings, including circus, reality shows, sports events like the Olympics, movies and commercials. Individuals who opt for a career as acrobats must be prepared to face rejections and intermittent periods of work. The creativity of acrobats may extend to other aspects of the performance. For example, acrobats in the circus may work with gym trainers, celebrities or collaborate with other professionals to enhance such performance elements as costume and or maybe at the teaching end of the career.
Career as a video game designer is filled with excitement as well as responsibilities. A video game designer is someone who is involved in the process of creating a game from day one. He or she is responsible for fulfilling duties like designing the character of the game, the several levels involved, plot, art and similar other elements. Individuals who opt for a career as a video game designer may also write the codes for the game using different programming languages.
Depending on the video game designer job description and experience they may also have to lead a team and do the early testing of the game in order to suggest changes and find loopholes.
Radio Jockey is an exciting, promising career and a great challenge for music lovers. If you are really interested in a career as radio jockey, then it is very important for an RJ to have an automatic, fun, and friendly personality. If you want to get a job done in this field, a strong command of the language and a good voice are always good things. Apart from this, in order to be a good radio jockey, you will also listen to good radio jockeys so that you can understand their style and later make your own by practicing.
A career as radio jockey has a lot to offer to deserving candidates. If you want to know more about a career as radio jockey, and how to become a radio jockey then continue reading the article.
The word “choreography" actually comes from Greek words that mean “dance writing." Individuals who opt for a career as a choreographer create and direct original dances, in addition to developing interpretations of existing dances. A Choreographer dances and utilises his or her creativity in other aspects of dance performance. For example, he or she may work with the music director to select music or collaborate with other famous choreographers to enhance such performance elements as lighting, costume and set design.
A multimedia specialist is a media professional who creates, audio, videos, graphic image files, computer animations for multimedia applications. He or she is responsible for planning, producing, and maintaining websites and applications.
A career as social media manager involves implementing the company’s or brand’s marketing plan across all social media channels. Social media managers help in building or improving a brand’s or a company’s website traffic, build brand awareness, create and implement marketing and brand strategy. Social media managers are key to important social communication as well.
In a career as a copywriter, one has to consult with the client and understand the brief well. A career as a copywriter has a lot to offer to deserving candidates. Several new mediums of advertising are opening therefore making it a lucrative career choice. Students can pursue various copywriter courses such as Journalism, Advertising, Marketing Management. Here, we have discussed how to become a freelance copywriter, copywriter career path, how to become a copywriter in India, and copywriting career outlook.
Careers in journalism are filled with excitement as well as responsibilities. One cannot afford to miss out on the details. As it is the small details that provide insights into a story. Depending on those insights a journalist goes about writing a news article. A journalism career can be stressful at times but if you are someone who is passionate about it then it is the right choice for you. If you want to know more about the media field and journalist career then continue reading this article.
For publishing books, newspapers, magazines and digital material, editorial and commercial strategies are set by publishers. Individuals in publishing career paths make choices about the markets their businesses will reach and the type of content that their audience will be served. Individuals in book publisher careers collaborate with editorial staff, designers, authors, and freelance contributors who develop and manage the creation of content.
In a career as a vlogger, one generally works for himself or herself. However, once an individual has gained viewership there are several brands and companies that approach them for paid collaboration. It is one of those fields where an individual can earn well while following his or her passion.
Ever since internet costs got reduced the viewership for these types of content has increased on a large scale. Therefore, a career as a vlogger has a lot to offer. If you want to know more about the Vlogger eligibility, roles and responsibilities then continue reading the article.
Individuals in the editor career path is an unsung hero of the news industry who polishes the language of the news stories provided by stringers, reporters, copywriters and content writers and also news agencies. Individuals who opt for a career as an editor make it more persuasive, concise and clear for readers. In this article, we will discuss the details of the editor's career path such as how to become an editor in India, editor salary in India and editor skills and qualities.
Linguistic meaning is related to language or Linguistics which is the study of languages. A career as a linguistic meaning, a profession that is based on the scientific study of language, and it's a very broad field with many specialities. Famous linguists work in academia, researching and teaching different areas of language, such as phonetics (sounds), syntax (word order) and semantics (meaning).
Other researchers focus on specialities like computational linguistics, which seeks to better match human and computer language capacities, or applied linguistics, which is concerned with improving language education. Still, others work as language experts for the government, advertising companies, dictionary publishers and various other private enterprises. Some might work from home as freelance linguists. Philologist, phonologist, and dialectician are some of Linguist synonym. Linguists can study French, German, Italian.
The career of a travel journalist is full of passion, excitement and responsibility. Journalism as a career could be challenging at times, but if you're someone who has been genuinely enthusiastic about all this, then it is the best decision for you. Travel journalism jobs are all about insightful, artfully written, informative narratives designed to cover the travel industry. Travel Journalist is someone who explores, gathers and presents information as a news article.
Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues.
A quality controller plays a crucial role in an organisation. He or she is responsible for performing quality checks on manufactured products. He or she identifies the defects in a product and rejects the product.
A quality controller records detailed information about products with defects and sends it to the supervisor or plant manager to take necessary actions to improve the production process.
A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.
A QA Lead is in charge of the QA Team. The role of QA Lead comes with the responsibility of assessing services and products in order to determine that he or she meets the quality standards. He or she develops, implements and manages test plans.
A metallurgical engineer is a professional who studies and produces materials that bring power to our world. He or she extracts metals from ores and rocks and transforms them into alloys, high-purity metals and other materials used in developing infrastructure, transportation and healthcare equipment.
An Azure Administrator is a professional responsible for implementing, monitoring, and maintaining Azure Solutions. He or she manages cloud infrastructure service instances and various cloud servers as well as sets up public and private cloud systems.
An AWS Solution Architect is someone who specializes in developing and implementing cloud computing systems. He or she has a good understanding of the various aspects of cloud computing and can confidently deploy and manage their systems. He or she troubleshoots the issues and evaluates the risk from the third party.
Careers in computer programming primarily refer to the systematic act of writing code and moreover include wider computer science areas. The word 'programmer' or 'coder' has entered into practice with the growing number of newly self-taught tech enthusiasts. Computer programming careers involve the use of designs created by software developers and engineers and transforming them into commands that can be implemented by computers. These commands result in regular usage of social media sites, word-processing applications and browsers.
A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.
Individuals in the information security manager career path involves in overseeing and controlling all aspects of computer security. The IT security manager job description includes planning and carrying out security measures to protect the business data and information from corruption, theft, unauthorised access, and deliberate attack