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Find (del f)/(del x), (del f)/(del y),(d...

Find `(del f)/(del x), (del f)/(del y),(del^(2) f)/(delx^(2)), (del^(2) f)/(del y^(2))`, at x=2, y=3 if f(x,y) `=2x^(2) + 3y^(2) - 8xy`.

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