Answer
{1,2,3,7,8}
Work Step by Step
The union of sets A and B is the set of elements that are members
of set A or of set B or of both sets. Elements in either {1,3,7,8} or {2,3,8} or both include {1,2,3,7,8}.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.1 - Algebraic Expressions, Mathematical Models, and Real Numbers - Exercise Set - Page 17: 30
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