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Find the Requested Partial Derivative (w/x)y( \partial w / \partial x ) _ { y }

Question 59

Multiple Choice

Find the requested partial derivative.
- (w/x) y( \partial w / \partial x ) _ { y } if w=x3+y3+z3+18xyzw = x ^ { 3 } + y ^ { 3 } + z ^ { 3 } + 18 x y z and z=x2+y2z = x ^ { 2 } + y ^ { 2 }


A) 3x(3x+2z2) +18y(2x2+3z) 3 x \left( 3 x + 2 z ^ { 2 } \right) + 18 y \left( 2 x ^ { 2 } + 3 z \right)
B) 3x(x+2z2) +18y(2x2+z) 3 x \left( x + 2 z ^ { 2 } \right) + 18 y \left( 2 x ^ { 2 } + z \right)
C) 3x(x+2z2) +18y(2x2+3z) 3 x \left( x + 2 z ^ { 2 } \right) + 18 y \left( 2 x ^ { 2 } + 3 z \right)
D) 3x(3x+2z2) +18y(2x2+z) 3 x \left( 3 x + 2 z ^ { 2 } \right) + 18 y \left( 2 x ^ { 2 } + z \right)

Correct Answer:

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