Answer
All the real numbers.
Work Step by Step
The function is not a fractional function and doesn't contain roots on even powers, thus its domain is all the real numbers.
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 2 - Review Exercises - Page 172: 20
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