Find the partial derivatives of the function

  • Thread starter cwesto
  • Start date
  • #1
18
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Main Question or Discussion Point

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

find:

fx(x,y)
fy(x,y)

The attempt:

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

Answers and Replies

  • #2
346
0
use the quotient rule for differentiation? or product rule but with (9+7y)^(-1) for eg.

is this homework? it looks like the wrong forum to me
 
  • #3
18
0
Oh sorry.
 

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