derivative f(x)=(sqrt(x))/(x+8)

Lösung

ableitung von

f (x) = \frac{x}{x + 8}

\frac{- x + 8}{2 x ( x + 8 ) ^{2}}

Schritte zur Lösung

\frac{d}{d x} (\frac{x}{x + 8})

Wende die Quotientenregel an:

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

= \frac{\frac{d}{d x} ( x ) ( x + 8 ) - \frac{d}{d x} ( x + 8 ) x}{( x + 8 ) ^{2}}

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

\frac{d}{d x} (x + 8) = 1

= \frac{\frac{1}{2 x} ( x + 8 ) - 1 \cdot x}{( x + 8 ) ^{2}}

Vereinfache

\frac{\frac{1}{2 x} ( x + 8 ) - 1 \cdot x}{( x + 8 ) ^{2}} : \frac{- x + 8}{2 x ( x + 8 ) ^{2}}

= \frac{- x + 8}{2 x ( x + 8 ) ^{2}}

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