Discrete Mathematics with Applications 4th Edition

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

Chapter 1 - Speaking Mathematically - Exercise Set 1.2: 10

Answer

a. No. b. No. c. Yes. d. Yes.

Work Step by Step

In ordered pairs, the order in which the elements appear matters, unlike in normal sets. Recall that $(a,b)=(c,d)$ if and only if $a=b$ and $c=d$. In part (d), for example, $\frac{-2}{-4}=\frac{3}{6}=\frac{1}{2}$ and $(-2)^{3}=(-2)\times (-2)\times (-2)=-8$.
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