Answer
Neither can be placed in the given blank in the question.
Work Step by Step
{7,8,9,} ∅
Elements of the first set 7,8,9 are not present in the empty set.
Therefore neither can be placed in the blank given.
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: 37
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