Question: Please solve 1, 2, 31.2.3. Let ( f(x, y)=x^{2}-x y+5 y^{2} ). Then [ f_{x}(4,1)= ] and ( f_{y}(4,1)= ) What is the directional derivative

Please solve 1, 2, 31.2.3. Let $ f(x, y)=x^{2}-x y+5 y^{2} $. Then \[ f_{x}(4,1)= \] and $ f_{y}(4,1)= $ What is the directional derivative of $ f(x, y) $ at $ (x, y)=(4,1) $ in the direction \( \left\langle\frac{3}{5}, 2 answers

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