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Multivariable & Vectormedium
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Find the directional derivative of f(x,y)=3x−y2f(x, y) = 3x - y^2f(x,y)=3x−y2 at the point (2,1)(2, 1)(2,1) in the direction of the vector v=⟨3,4⟩\mathbf{v} = \langle 3, 4 \ranglev=⟨3,4⟩.