For each of the following functions find the fx ,fy and show that fxy=fyx. fx,y=cosx2-3xy

For each of the following functions find
the $f_{x}, f_{y}$ and show that $f_{x y} = f_{y x}$ . $f (x, y) = \cos (x^{2} - 3 x y)$

Matching exercise

Match the items on the right to the items on the left.

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