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NCERT Class 11 Maths Textbook Chapter 13 With Answer PDF Free Download

Chapter 13: Limits and Derivatives
13.1 Introduction
This chapter is an introduction to Calculus. Calculus is a branch of mathematics which mainly deals with the study of change in the value of a function as the points in the domain change.
First, we give an intuitive idea of derivatives (without actually defining them).
Then we give a naive definition of a limit and study some algebra of limits. Then we come back to a definition of derivative and study some algebra of derivatives. We also obtain derivatives of certain
standard functions.
13.2 Intuitive Idea of Derivatives
Physical experiments have confirmed that the body dropped from a tall cliff covers a distance of 4.9t 2 meters in t seconds, i.e., distance s in meters covered by the body as a function of time t in seconds is given by s = 4.9t2.
The adjoining Table 13.1 gives the distance travelled in metres at various intervals of time in seconds of a body dropped from a tall cliff. The objective is to find the velocity of the body at time t = 2 seconds from this data.
One way to approach this problem is to find the average velocity for various intervals of time ending at t = 2 seconds and hope that these throw some light on the velocity at t = 2 seconds.
Average velocity between t = t 1 and t = t2 equals distance travelled between t = t1 and t = t2 seconds divided by (t 2 – t 1). Hence the average velocity in the first two seconds
Author | NCERT |
Language | English |
No. of Pages | 40 |
PDF Size | 899 KB |
Category | Mathematics |
Source/Credits | ncert.nic.in |
NCERT Solutions Class 11 Maths Chapter 13 Limits and Derivatives
1. Evaluate the Given limit:
Solution:
Given

Substituting x = 3, we get
= 3 + 3
= 6
2. Evaluate the Given limit:
Solution:
Given limit:
Substituting x = π, we get
= (π – 22 / 7)
3. Evaluate the Given limit:
Solution:
Given limit:
Substituting r = 1, we get
= π(1)2
= π
4. Evaluate the Given limit:
Solution:
Given limit:
Substituting x = 4, we get
= [4(4) + 3] / (4 – 2)
= (16 + 3) / 2
= 19 / 2
5. Evaluate the Given limit:
Solution:
Given limit:
Substituting x = -1, we get

= [(-1)10 + (-1)5 + 1] / (-1 – 1)
= (1 – 1 + 1) / – 2
= – 1 / 2
NCERT Class 11 Maths Textbook Chapter 13 With Answer Book PDF Free Download