Question

Solve for R

1/R= 1/R1 + 1/R2

Answer 1

\(\large\color{black}{ \frac{\LARGE 1}{\LARGE R} =\frac{\LARGE 1}{\LARGE R_1}+\frac{\LARGE 1}{\LARGE R_2} }\) like this, correct?

Answer 2

reciprocate both sides

Answer 3

@SolomonZelman yes

Answer 4

@Zarkon can you show me how you would solve it? I did it and it got messy

Answer 5

@Zarkong after I reciprocate I get R = R/R1 + R/R2

Answer 6

\[R=\frac{1}{\frac{1}{R_1}+\frac{1}{R_2}}=\frac{R_1R_2}{R_1+R_2}\]