Answer
$-c\lt u \lt c$
Work Step by Step
If $c\gt0$, then $|u|\lt c$ is equivalent to $-c\lt u \lt c$ because $|u|=u$ if $u\gt0$ and $|u|=-u$ if $u\leq0$.
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 4 - Section 4.3 - Equations and Inequalities Involving Absolute Value - Concept and Vocabulary Check - Page 283: 3
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