Determine the gradient vector of the function f(x,y)=3x2−y2f(x,y) = 3x^2 - y^2f(x,y)=3x2−y2 at the point (1,−2)(1, -2)(1,−2).
⟨6,4⟩\langle 6, 4 \rangle⟨6,4⟩
⟨6,−4⟩\langle 6, -4 \rangle⟨6,−4⟩
⟨3,4⟩\langle 3, 4 \rangle⟨3,4⟩
⟨6,2⟩\langle 6, 2 \rangle⟨6,2⟩