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Find the Derivative of the Function at P0 in the Direction

Question 135

Multiple Choice

Find the derivative of the function at P0 in the direction of u.
- f(x,y,z) =2xy3z2,P0(2,8,4) ,u=2i+j2kf ( x , y , z ) = 2 x y ^ { 3 } z ^ { 2 } , \quad P _ { 0 } ( 2,8,4 ) , \quad \mathbf { u } = - 2 \mathbf { i } + \mathbf { j } - 2 \mathbf { k }


A) 16,384- 16,384
B) 57,3443- \frac { 57,344 } { 3 }
C) 53,2483- \frac { 53,248 } { 3 }
D) 20,480- 20,480

Correct Answer:

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