Answer
{ } ⊆ ∅
Work Step by Step
{ } represents empty set.
∅ represents empty set.
Therefore Empty set is the subset of empty set and they are equal.
{ } ⊆ ∅
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 68: 40
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