SOLUTION: What is r: 1/r=a/r1+b/r2 Thanks in advance

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Question 351564: What is r:
1/r=a/r1+b/r2
Thanks in advance
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
What is r:
1/r=a/r1+b/r2
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I assume the "1" and "2" are subscripts.
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1/r = (ar2+br1)/(r1r2)
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Invert to get:
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r = (r1r2)/(ar2+br1)
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Cheers,
Stan H.