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May 4, 2015

Homework Help: Pre-Calc

Posted by Jon on Sunday, December 6, 2009 at 9:49pm.

Hello, I am not sure how to go about solving this equation:

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. Find the resistance of the second resistor if the total resistance of the pair is 1.7 ohms.

I'm not sure how to go about this I thought maybe:

1/1.7=1/2.3+1/x

I've never done anything like this before

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