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 4.4 - Page 190: 33

Answer

$a-c$ is odd.

Work Step by Step

Since $a-b$ is odd and $b-c$ is even and odd+even=odd, adding the two to yield $a-c$ results in an odd number.
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