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Let f(x,y)=3x+2yf ( x , y ) = 3 x + 2 y

Question 199

Multiple Choice

Let f(x,y) =3x+2yf ( x , y ) = 3 x + 2 y . Find the gradient vector f\nabla f .


A) 3xi+2yj3 x \mathbf { i } + 2 y \mathbf { j }

B) 3x2i+2y2j3 x ^ { 2 } \mathbf { i } + 2 y ^ { 2 } \mathbf { j }
C)
2xi+3yj2 x \mathbf { i } + 3 y \mathbf { j }
D) 2x2i+3y2j2 x ^ { 2 } \mathbf { i } + 3 y ^ { 2 } \mathbf { j }
E) 3yi+2xj3 y \mathbf { i } + 2 x \mathbf { j }
F) 2yi+3xj2 y \mathbf { i } + 3 x \mathbf { j }

G) 2i+3j2 \mathbf { i } + 3 \mathbf { j }

H) 3i+2j3 \mathbf { i } + 2 \mathbf { j }

Correct Answer:

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