Thinking Mathematically (6th Edition)

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: 88


false, If x∊M, then x∊D

Work Step by Step

If x∊D, then x∊M. The above statement is false. It is not necessary that an element belong to D must also belong to M. So the correct statement is If x∊M, then x∊D.
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