SOLUTION: Simplify: 3/[(1/a) + (1/b)]

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Question 620872: Simplify: 3/[(1/a) + (1/b)]
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Re TY, As to demominator %28%281%2Fa%29+%2B+%281%2Fb%29%29: 

Puting in terms of %28b%2Ba%29%2Fab%29 (Using a common denominator)allows us to work together with the numerator more easily

3%2F%28%281%2Fa%29+%2B+%281%2Fb%29%29=+3%2F%28%28b%2Ba%29%2Fab%29+=+3ab%2F%28a%2Bb%29