Answer
$R_1=\frac{1}{\frac{1}{R_2}-\frac{1}{R}}$
Work Step by Step
$\frac{1}{R}=\frac{1}{R_1}+\frac{1}{R_2}$
$\frac{1}{R_1}=\frac{1}{R_2}-\frac{1}{R}$
$1=R_1(\frac{1}{R_2}-\frac{1}{R})$
$R_1=\frac{1}{\frac{1}{R_2}-\frac{1}{R}}$
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: 40
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