SOLUTION: 1/R = 1/r1 + 1/r2 for R but i don't wanna take L.C.M plz help

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Question 1147924: 1/R = 1/r1 + 1/r2 for R
but i don't wanna take L.C.M
plz help
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39623)   (Show Source): You can put this solution on YOUR website!
Unclear.

OR

?
Answer by ikleyn(52832)   (Show Source): You can put this solution on YOUR website!
.

Given


     =  + .


Then


     =  +  = .


Hence,


    R = .    ANSWER

Solved.


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