derivative of 9sqrt(x)+7

解答

\frac{d}{d x} (9 x + 7)

\frac{9}{2 x}

求解步骤

\frac{d}{d x} (9 x + 7)

使用微分加减法定则:

(f \pm g)^{'} = f^{'} \pm g^{'}

= \frac{d}{d x} (9 x) + \frac{d}{d x} (7)

\frac{d}{d x} (9 x) = \frac{9}{2 x}

\frac{d}{d x} (7) = 0

= \frac{9}{2 x} + 0

化简

= \frac{9}{2 x}

6 y^{^{''}} - 6 y^{^{'}} + 39 y = 0

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