Answer
True
Work Step by Step
If A ⊆ B and d∊A, then d∊B,
The above statement is true since all elements of A are also in 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 - 2.2 Subsets - Exercise Set 2.2 - Page 69: 77
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