Discrete Mathematics with Applications 4th Edition

Published by Cengage Learning
ISBN 10: 0-49539-132-8
ISBN 13: 978-0-49539-132-6

Chapter 4 - Elementary Number Theory and Methods of Proof - Exercise Set 4.1 - Page 162: 51

Answer

This is false, consider $n=2$

Work Step by Step

Considering the $n=2$ case, we get 1 = -1, clearly false. Therefore, since 2 is prime, the statement must be false.
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