Question: If f (x, y) = x3 + ln (xy - 1), find the following. (a) 2f/x2 (b) 2f/y2 (c) 2f/x y (d) 2f/yx

If f (x, y) = x3 + ln (xy - 1), find the following.
(a) ∂2f/x2
(b) ∂2f/∂y2
(c) ∂2f/∂x ∂y
(d) ∂2f/∂y∂x

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