- #1

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## Main Question or Discussion Point

The problem:

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

find:

f

f

The attempt:

f

f

Questions:

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

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.