Partial derivatives

Calculus Level 4

Find \(\frac { \delta w }{ \delta x } \) at the point \((x,y,z)=(2,-1,1)\) if \(w={ x }^{ 2 }+{ y }^{ 2 }+{ z }^{ 2 }\) , \({ z }^{ 3 }-xy+yz+{ y }^{ 3 }=1\) , and \(x\) and \(y\) are the independent variables.

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