PreCalc

The total electrical resistance R of two resistors connected in parallel with resistances R1 and R2 is given by 1/R=1/R1+1/R2. One resistor has a resistance of 2.3 ohms. Let x be the resistance of the second resistor. Express the total resistance R as a function of x. How do I go about this?

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  1. Type "1/R=1/2.3+1/x solve for x" into WolframAlpha . com and click "Show steps"

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  2. Oops, I meant "1/R=1/2.3+1/x solve for R"

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  3. 1/R=1/2.3+1/x solve for x"

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