Answer
See below.
Work Step by Step
Answer may vary.
(a) an arbitrarily chosen rational number.
(b) integers $a$ and $b$
(c) $(\frac{a}{b})^2$
(d) $b^2$
(e) zero product property.
(f) $r^2$ is also a rational number
Discrete Mathematics with Applications 4th Edition
by Epp, Susanna S.
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 4.2 - Page 168: 12
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