derivative of (5x/(x+3))

Lösung

\frac{d}{d x} (\frac{5 x}{x + 3})

\frac{15}{( x + 3 ) ^{2}}

Schritte zur Lösung

\frac{d}{d x} (\frac{5 x}{x + 3})

Entferne die Konstante:

(a \cdot f)^{'} = a \cdot f^{'}

= 5 \frac{d}{d x} (\frac{x}{x + 3})

Wende die Quotientenregel an:

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

= 5 \cdot \frac{\frac{d x}{d x} ( x + 3 ) - \frac{d}{d x} ( x + 3 ) x}{( x + 3 ) ^{2}}

\frac{d x}{d x} = 1

\frac{d}{d x} (x + 3) = 1

= 5 \cdot \frac{1 \cdot ( x + 3 ) - 1 \cdot x}{( x + 3 ) ^{2}}

Vereinfache

5 \cdot \frac{1 \cdot ( x + 3 ) - 1 \cdot x}{( x + 3 ) ^{2}} : \frac{15}{( x + 3 ) ^{2}}

= \frac{15}{( x + 3 ) ^{2}}

\frac{d}{d t} (t - \frac{t ^{3}}{3})

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