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If x^(m)y^(n) = (x + y)^(m +n) then (dy)...

If `x^(m)y^(n) = (x + y)^(m +n)` then `(dy)/(dx)` is equal to

A

`(x + y)/(xy)`

B

xy

C

0

D

`(y)/(x)`

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The correct Answer is:
D
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