(d^2}{d{x}^2}(({f}(x,y))(-6{x)/y-6{x}))

解答

\frac{d ^{2}}{d x ^{2}} ((f (x, y)) (- 6 x y - 6 x))

0

求解步骤

\frac{d ^{2}}{d x ^{2}} ((f (x, y)) (- 6 x y - 6 x))

\frac{d}{d x} (f (x, y) (- 6 x y - 6 x)) = f (x, y) (- 6 y - 6)

= \frac{d}{d x} (f (x, y) (- 6 y - 6))

\frac{d}{d x} (f (x, y) (- 6 y - 6)) = 0

= 0

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