Let $f ( x , y ) = x ^ { 2 } + 3 y ^ { 2 } - 3 x$

question 42

Multiple Choice

Let $f ( x , y ) = x ^ { 2 } + 3 y ^ { 2 } - 3 x$ Find the gradient vector of f at the point (-1, 2) .

• A) \(\nabla f = - 5 \vec { i } - 12 \vec { j }\)
• B) \(\nabla f = - 5 \vec { i } + 24 \vec { j }\)
• C) \(\nabla f = 5 \vec { i } + 12 \vec { j }\)
• D) \(\nabla f = - 5 \vec { i } + 12 \vec { j }\)

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