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 1.1: 13

Answer

a. real number; product with every real number equals zero b. with every real number equals zero c. the product of $a$ and $b$ equals zero (i.e., $a\times b=0$)

Work Step by Step

The real number $a$ is, of course, zero, also called the additive identity (because $x+0=x$ for every real number $x$).
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