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 70: 100

Answer

A proper subset is a subset of a certain set that it isn't equal to.

Work Step by Step

A subset is a set whose elements are all contained in another set. A proper subset is a subset of a certain set that it isn't equal to. The answer is derived from the definition of a subset and the definition of a proper subset.
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