derivative (x^2)/(5+x)

解答

导数

\frac{x ^{2}}{5 + x}

\frac{10 x + x ^{2}}{( 5 + x ) ^{2}}

求解步骤

\frac{d}{d x} (\frac{x ^{2}}{5 + 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 ^{2} ) ( 5 + x ) - \frac{d}{d x} ( 5 + x ) x ^{2}}{( 5 + x ) ^{2}}

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

\frac{d}{d x} (5 + x) = 1

= \frac{2 x ( 5 + x ) - 1 \cdot x ^{2}}{( 5 + x ) ^{2}}

化简

\frac{2 x ( 5 + x ) - 1 \cdot x ^{2}}{( 5 + x ) ^{2}} : \frac{10 x + x ^{2}}{( 5 + x ) ^{2}}

= \frac{10 x + x ^{2}}{( 5 + x ) ^{2}}

d er i v a t i v e 10 x

t an g e n t y = \frac{14}{1 + e ^{- x}}, (0, 7)

\int 13 ln (x^{2} - x + 6) d x

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