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Kee B.

asked • 09/30/14

Partial derivative

find the ∂f/∂x and ∂f/∂y of:
1.f(x,y)=tan-1(y/x)
2.f(x,y)=e-xsin(x+y)
3. f(x,y)=x/(x^2+y^2)
 

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