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1/M +1/N = 1/P for P 

 Mar 7, 2018
 #1
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\( \frac{1}{M} +\frac{1}{N} = \frac{1}{P} \;\;find\;\;P \\ \frac{N}{MN} +\frac{M}{NM} = \frac{1}{P}\\ \frac{N+M}{MN} = \frac{1}{P}\\ \frac{MN}{N+M} = \frac{P}{1}\\ P=\frac{MN}{N+M} \)

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 Mar 7, 2018

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