derivative ((x+9))/(sqrt(x))

解答

导数

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

\frac{x - 9}{2 x x}

求解步骤

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

使用微分除法定则:

(\frac{f}{g})^{'} = \frac{f ^{'} \cdot g - g ^{'} \cdot f}{g ^{2}}

= \frac{\frac{d}{d x} ( x + 9 ) x - \frac{d}{d x} ( x ) ( x + 9 )}{( x ) ^{2}}

\frac{d}{d x} (x + 9) = 1

\frac{d}{d x} (x) = \frac{1}{2 x}

= \frac{1 \cdot x - \frac{1}{2 x} ( x + 9 )}{( x ) ^{2}}

化简

\frac{1 \cdot x - \frac{1}{2 x} ( x + 9 )}{( x ) ^{2}} : \frac{x - 9}{2 x x}

= \frac{x - 9}{2 x x}

\frac{d}{d t} (\frac{1}{t ^{4}})

\int 8 x cos (5 x) d x

y^{^{''}} + 9 y^{^{'}} = 1

x \to - 2 lim (\frac{2 x}{x ^{2} - 4})

f (x) = e^{2} x