BuyFind

Single Variable Calculus: Concepts...

4th Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781337687805
BuyFind

Single Variable Calculus: Concepts...

4th Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781337687805

Solutions

Chapter 2, Problem 2RCC
To determine

To describe: The limit can fail to exist in several ways.

Expert Solution

Explanation of Solution

The limit fails to exist for several ways are:

  1. (i) The left and right limits are not equal

Graph:

Single Variable Calculus: Concepts and Contexts, Enhanced Edition, Chapter 2, Problem 2RCC , additional homework tip  1

Example: limx3f(x)

Here f(x) approaches to two different values depending on direction of x approaches from. In graph limx3f(x)2 and limx3+f(x)3.

(ii) When the function approach a infinity large value the limit fails to exits.

Graph:

Single Variable Calculus: Concepts and Contexts, Enhanced Edition, Chapter 2, Problem 2RCC , additional homework tip  2

Example: limx3f(x)

In the graph limx3f(x) doesn’t not exist, because the function has not approach a

particular value.

(iii) When the function doesn’t approach a particular value then the limit of the function doesn’t  exist

Graph:

Single Variable Calculus: Concepts and Contexts, Enhanced Edition, Chapter 2, Problem 2RCC , additional homework tip  3

Example:f(x)=sin(1x) as x approaches 0.

The function starts the oscillations faster. The function oscillates between 1 and –1.

(iv) When x-value is approaching the endpoint of a closed interval the limit of the function doesn’t exist.

Graph:

Single Variable Calculus: Concepts and Contexts, Enhanced Edition, Chapter 2, Problem 2RCC , additional homework tip  4

Example:f(x)=x

In the graph the function is only defined for x-values to the right of 0, but x doesn’t approach from the left. So the both sides are not equal then the limit of the function doesn’t exist.

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