Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 5 - Number Theory and the Real Number System - Chapter Summary, Review, and Test - Review Exercises - Page 335: 80

Answer

$0$ (Refer to the step by step part for the explanation).

Work Step by Step

RECALL: The integers are: $\left\{...-3, -2, -1, 0, 1, 2, 3, ...\right\}$ The natural numbers are: $\left\{1, 2, 3, ...\right\}$ Thus, an example of an integer that is not a natural number is $0$. (There are a lot of other examples such as -1, -2, -3, etc.)
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