Let$f ( x , y ) = \left\{ \begin{array} { l l }
\frac { x ^ { 2 } } { x + y } & \text { if } ( x , y ) \neq ( 0,0 ) \
0 & \text { if } ( x , y ) = ( 0,0 )
\end{array} \right.$

Question

Let$f ( x , y ) = \left\{ \begin{array} { l l } 
\frac { x ^ { 2 } } { x + y } & \text { if } ( x , y ) \neq ( 0,0 ) \
0 & \text { if } ( x , y ) = ( 0,0 )
\end{array} \right.$

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The Answer of Let$f ( x , y ) = \left\{ \begin{array} { l l } 
\frac { x ^ { 2 } } { x + y } & \text { if } ( x , y ) \neq ( 0,0 ) \
0 & \text { if } ( x , y ) = ( 0,0 )
\end{array} \right.$

Let (A) Find $\frac { \delta f } { \delta x }$

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Let (A) Find δfδx\frac { \delta f } { \delta x }δxδf​

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Let (A) Find $\frac { \delta f } { \delta x }$

Correct Answer:
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