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The Gradient Of f(x,y,z)=x2y+y2z+z2xf ( x , y , z ) = x ^ { 2 } y + y ^ { 2 } z + z ^ { 2 } x

Question 15

Multiple Choice

The gradient of f(x,y,z) =x2y+y2z+z2xf ( x , y , z ) = x ^ { 2 } y + y ^ { 2 } z + z ^ { 2 } x at (1, 2, -1) is


A) 5i+3j+2k- 5 \mathbf { i } + 3 \mathbf { j } + 2 \mathbf { k }
B) 5i3j2k5 \mathbf { i } - 3 \mathbf { j } - 2 \mathbf { k }
C) 5i+3j+2k5 \mathbf { i } + 3 \mathbf { j } + 2 \mathbf { k }
D) 5i3j+2k- 5 \mathbf { i } - 3 \mathbf { j } + 2 \mathbf { k }
E) 5i3j+2k5 \mathbf { i } - 3 \mathbf { j } + 2 \mathbf { k }

Correct Answer:

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