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 - 5.5 Real Numbers and Their Properties; Clock Addition - Exercise Set 5.5: 91

Answer

The statement makes sense. Create a subset of integers: $\left\{1, 2, 3\right\}$ $1+3=4$, which is not an element of the set.

Work Step by Step

The statement makes sense. To illustrate, if the subset $\left\{1, 2, 3\right\}$ is taken, $1+3=4$, which is not an element of the set. Thus, this subset of integers is not closed under addition.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.