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: 46

Answer

This is not an empty set.

Work Step by Step

{x | x is a number less than 3 or greater than 7} Note that we are asked for numbers that are EITHER less than 3 OR greater than 7. This isn't an empty set; instead, it's a set of all numbers excluding numbers between 3 and 7.
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