Answer
true
Work Step by Step
$\{7\}$ ∊ $\{7, 8\}$
This statement is true, as $7$, which is the only element in the set on the left, is also an element of the set on the right.
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 - 2.1 Basic Set Concepts - Exercise Set 2.1 - Page 59: 64
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