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Find the Partial Derivative fx for the function f(x,y)=28x+y3f _ { x } \text { for the function } f ( x , y ) = \sqrt { 28 x + y ^ { 3 } } \text {. }

Question 78

Multiple Choice

Find the partial derivative fx for the function f(x,y) =28x+y3f _ { x } \text { for the function } f ( x , y ) = \sqrt { 28 x + y ^ { 3 } } \text {. }


A)
fx(x,y) =1428x+y3f _ { x } ( x , y ) = \frac { 14 } { \sqrt { 28 x + y ^ { 3 } } }
B)
fx(x,y) =393x28x+y3f _ { x } ( x , y ) = \frac { 393 x } { \sqrt { 28 x + y ^ { 3 } } }
C)
fx(x,y) =19728x+y3f _ { x } ( x , y ) = \frac { 197 } { \sqrt { 28 x + y ^ { 3 } } }
D)
fx(x,y) =1228x+y3f _ { x } ( x , y ) = \frac { 1 } { 2 \sqrt { 28 x + y ^ { 3 } } }
E)
fx(x,y) =28x28x+y3f _ { x } ( x , y ) = \frac { 28 x } { \sqrt { 28 x + y ^ { 3 } } }

Correct Answer:

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