Answer
No.
Work Step by Step
If $a$ and $b$ are both nonpositive or both nonnegative: $|a+b|=|a|+|b|$. Otherwise: $|a+b|\lt|a|+|b|$. There is no other possibility.
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
Published by
W. H. Freeman
ISBN 10:
1464125260
ISBN 13:
978-1-46412-526-3
Chapter 1 - Precalculus Review - 1.1 Real Numbers, Functions, and Graphs - Preliminary Questions - Page 9: 4
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