Answer
$f=\frac{1}{\frac{1}{p}+\frac{1}{q}}$
Work Step by Step
$\frac{1}{p}+\frac{1}{q}=\frac{1}{f}$
$f(\frac{1}{p}+\frac{1}{q})=1$
$f=\frac{1}{\frac{1}{p}+\frac{1}{q}}$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.7 - Equations - Exercise Set - Page 106: 39
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