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- Anyone good at maths?
is your formula supposed to say:

~~1/R = 1/r +1/r?~~In which case it would be:

1/R = 2/r

r = 2R

R = r/2

ah, you’ve edited

Posted 4 years ago1/R = 1/x + 1/y

Posted 4 years ago

1/R = (x+y)/xy

R = xy/(x+y)Has university challenge taught you nothing?!? It’s either zero or one.

Posted 4 years ago42.

Posted 4 years ago

Well it is the answer to everything.Can anyone solve this equation?

Change the subject of the equation to R.

Posted 4 years ago

1 over R = 1 over x + 1 over yStoner has the correct answer

Posted 4 years agoxR3i = 3ix/(1/x + 1/y)

Posted 4 years agoI agree with stoner, oh and it is the right answer to!

Posted 4 years agoLooks like a baby robin to me…………

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