Question 6
Multiple Choice
Let f(x,y,z) =x2+3yz−z2 . Its gradient vector field is
A) ∇f(x,y) =2x2+3yz−z22xi+3zj+(3y−2z) k
B) ∇f(x,y) =2x2+3yz−z22xi+3zj−(3y−2z) k
C) ∇f(x,y) =2x2+3yz−z22xi−3zj+(3y−2z) k
D) ∇f(x,y) =2x2+3yz−z22xi−3zj−(3y−2z) k
E) ∇f(x,y) =2x2+3yz−z22xi+3zj+(3y+2z) k
Correct Answer:

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