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(Solved): Find fx. 40) f(x,y)=x2+y2x2y2 A) (x2+y2)24xy2 B) (x2+y2)22y2 C) (x2+y2)44xy2 D) ( ...

$Find \( \mathbf{f}_{\mathbf{x}} \). 40) \( f(x, y)=\frac{x^{2}-y^{2}}{x^{2}+y^{2}} \) A) \( \frac{4 x y^{2}}{\left(x^{2}+y^{2$

Find

f_{x}

. 40)

f (x, y) = \frac{x ^{2} - y ^{2}}{x ^{2} + y ^{2}}

A)

\frac{4 x y ^{2}}{( x ^{2} + y ^{2} ) ^{2}}

B)

\frac{2 y ^{2}}{( x ^{2} + y ^{2} ) ^{2}}

C)

\frac{4 x y ^{2}}{( x ^{2} + y ^{2} ) ^{4}}

D)

\frac{2 x ^{2} y ^{2}}{( x ^{2} + y ^{2} ) ^{2}}

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