Calculus, 8th Edition,stewart; page 59 problem 3

Question

Explain the meaning of each of the following.

Answer 1

Step:1

(a)

The function is.

As  tends to ,  approaches to positive infinity (positive large number).

(b)

The function is.

As  tends to  from right side,  approaches to negative infinity (negative large number).

Solution:

(a)  means that  approaches to positive infinity as  tends to .

(b)  means that  approaches to negative infinity as  tends to  from right.