If \[{{x}^{m}}{{y}^{n}}={{(x+y)}^{m+n}}\]then \[{{\left. \frac{dy}{dx} \right|}_{x=1,y=2}}\] is equal to [J & K 2005]

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

1.	If \[{{x}^{m}}{{y}^{n}}={{(x+y)}^{m+n}}\]then \[{{\left. \frac{dy}{dx} \right\|}_{x=1,y=2}}\] is equal to [J & K 2005]
A.	½
B.	2
C.	2m/n
D.	m/ 2n
Answer» C. 2m/n

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If \[{{x}^{m}}{{y}^{n}}={{(x+y)}^{m+n}}\]then \[{{\left. \frac{dy}{dx} \right|}_{x=1,y=2}}\] is equal to [J & K 2005]

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