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## Homework Statement

find a formula for the derivative of the function y = f(x) that satisfies the equation below.

## Homework Equations

[tex]\frac{1}{x^{2}+y^{2}}\[/tex] = 2xy

## The Attempt at a Solution

so my final answer is

2x

^{4}f(x)+4x

^{2}f(x)

^{2}+2f(x)

^{3}

all over

-2f(x)-2x

^{5}-4x

^{3}f(x)-2xf(x)

^{2}

Am i doing it right? I have a feeling I may have misunderstood the question.