Answer
Empty Set
Work Step by Step
The first president of the U.S.A. was elected in 1789. Since there are no U.S. presidents born before 1200, this is an empty set.
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 58: 36
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