Answer
{ x | x $\ne$ ± 3}
Work Step by Step
Since division by 0 is not allowed, we must have:
x² - 9 $\ne$ 0
x² $\ne$ 9
x $\ne$ ± $\sqrt 9$
x $\ne$ ± 3
Calculus 8th Edition
by Stewart, James
Published by
Cengage
ISBN 10:
1285740629
ISBN 13:
978-1-28574-062-1
Chapter 1 - Functions and Limits - 1.1 Four Ways to Represent a Function - 1.1 Exercises - Page 21: 31
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