Answer
$A\cup B$.
Work Step by Step
The set of elements that are either in set A or B (or both) is called the union of A and B and is denoted by $A\cup B$.
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 4.2 - Compound Inequalities - Concept and Vocabulary Check - Page 272: 2
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