Answer
$A ∪ B$ = {1, 2, 3, 4, 5, 6, 7, 8, 9}
Work Step by Step
In unions, we must include all elements in the sets that are specified. Therefore, we will list all the elements of both $A$ and $B$:
$A ∪ B$ = {1, 2, 3, 4, 5, 6, 7, 8, 9}
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 3 - Solving Inequalities - Chapter Review - Page 226: 58
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