question_answer

If \[{{x}^{m}}{{y}^{n}}={{(x+y)}^{m+n}},\] then \[\frac{dy}{dx}\]  is

A)  \[\frac{x+y}{xy}\]                   

B)  \[xy\]

C)  \[\frac{x}{y}\]                         

D)  \[\frac{y}{x}\]

E)  None of these