Calculus with Applications (10th Edition)

Published by Pearson
ISBN 10: 0321749006
ISBN 13: 978-0-32174-900-0

Chapter R - Algebra Reference - R.6 Exponents - R.6 Exercises: 21

Answer

$\displaystyle \frac{a+b}{ab}$

Work Step by Step

$a^{-1}+b^{-1}$=.........$\displaystyle \frac{1}{a^{n}}=a^{-n}$ ........ $=\displaystyle \frac{1}{a}+\frac{1}{b}$ =......... common denominator: ab .... $=\displaystyle \frac{b}{ab}+\frac{a}{ab}$ $=\displaystyle \frac{b+a}{ab}$
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