Answer
We know that union means or.
Work Step by Step
We know that "or" is used to depict the union of the two sets. Thus, we use the union symbol to depict that this is an "or" inequality.
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 2 - Section 2.7 - Absolute Value Inequalities - Vocabulary, Readiness & Video Check - Page 105: 7
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