Thinking Mathematically (6th Edition)

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: 45

Answer

This is NOT an empty set.

Work Step by Step

The set of {x|x is a number less than 2 or greater than 5} is not an empty set because: The set is infinite. An empty set would have no elements (numbers) in it. An example of an empty set would be changing the word OR to AND in the original problem.
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