Compute the gradient ∇f\nabla f∇f at the point (1,2)(1, 2)(1,2) where f(x,y)=x3−2xy+y2f(x, y) = x^3 - 2xy + y^2f(x,y)=x3−2xy+y2.
⟨3,−2⟩\langle 3, -2 \rangle⟨3,−2⟩
⟨7,0⟩\langle 7, 0 \rangle⟨7,0⟩
⟨1,2⟩\langle 1, 2 \rangle⟨1,2⟩
⟨9,−4⟩\langle 9, -4 \rangle⟨9,−4⟩