# To find the value of f − 1 ( 7 ) ### Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071 ### Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071

#### Solutions

Chapter 2.7, Problem 21E

1

To determine

## To find the value of f−1(7)

Expert Solution

Value of f1(7) is 2

### Explanation of Solution

Given: f(2)=7

Calculation:

f(2)=7

f1(7)=2

If f is a one-to-one function, the definition says that if f takes x to y , then f1 takes y back to x

2

To determine

### To find the value of f(−1)

Expert Solution

Value of f(1) is 3

### Explanation of Solution

Given: f1(3)=1

Calculation:

f1(3)=1

f(1)=3

If f is a one-to-one function, the definition says that if f takes x to y , then f1 takes y back to x

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