Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 5 - Review - Page 232: 3


$a\cdot \frac{1}{a}=1$.

Work Step by Step

We know that multiplying a number by its reciprocal makes it equal to $1$. Thus, for any number $a$ except 0, $a\cdot \frac{1}{a}=1$.
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