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If two resisters, with resistance `R_1` and `R_2` respectively, are in parallel, the total resistance `R` is given by the formula `1/R = 1/(R_1) + 1/(R_2)`.
Solve `1/R = 1/(R_1) + 1/(R_2)` for `R`.
`R` =
Enter your answer as an expression. To enter subscripts, use the underscore _ as in R_1. Use parentheses on numerator and denominator. `"(M*N)/(P+Y)"`
`(R_1*R_2)/(R_1+R_2)`