Answer
An identity is an equation that is true for every real number for which both sides are defined. For example, we have $a*1=a$.
Work Step by Step
$a*1=a$ and $a+0=a$ are the identity properties of multiplication and addition, respectively.
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter 1 - Equations and Inequalities - Exercise Set 1.2 - Page 121: 112
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