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f(x,y)=-[tex]\frac{-7x-2y}{9x+7y}[/tex]

find:

f_{x}(x,y)

f_{y}(x,y)

The attempt:

f_{x}(x,y)=[tex]\frac{-7-2y}{9+7y}[/tex]

f_{y}(x,y)=[tex]\frac{-7x-2}{9x+7}[/tex]

Questions:

I'm not exactly sure how to find the partail derivative with a fraction like this one.

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# Find the partial derivatives of the function

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