Answer
$R_T=\frac{R_1R_2}{R_1+R_2}$
Work Step by Step
$$R_{T}=\frac{1}{\frac{1}{R_{1}}+\frac{1}{R_{2}}}$$ $$R_T=\frac{1}{\frac{R_1+R_2}{R_1R_2}}$$ $$R_T=\frac{R_1R_2}{R_1+R_2}$$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Prerequisites - P.5 - Rational Expressions - Exercises - Page 50: 77
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