Answer
True
Work Step by Step
If x∊R, then x ∉ D.
The above statement is true.
A Republican cannot be Democrat at the same time.
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: 89
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