Partial Derivatives

I need help with this one:

Find fxy in:

ln(x+y)/(xy) .. the ln applies to the whole problem.
 

arildno

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I need help with this one:

Find fxy in:

ln(x+y)/(xy) .. the ln applies to the whole problem.
Well.

You might rewrite this using the prortyies of the logarithm, say:
f(x,y)=ln(x+y)-ln(xy)=ln(x+y)-ln(x)-ln(y)
 

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