Answer
union, A∪B.
Work Step by Step
The set of elements that are members of set A or set B or of both sets is called the union of sets A and B, and is symbolized by A∪B.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 2 - Set Theory - 2.3 Venn Diagrams and Set Operations - Concept and Vocabulary Check - Page 80: 4
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