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Beliebt Rechnen >

integral of x/(sqrt(x+11))

Lösung

\int \frac{x}{x + 11} d x

Lösung

2 (\frac{1}{3} (x + 11)^{\frac{3}{2}} - 11 x + 11) + C

Schritte zur Lösung

\int \frac{x}{x + 11} d x

Wende U-Substitution an

= \int 2 (u^{2} - 11) d u

Entferne die Konstante:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 2 \cdot \int u^{2} - 11 d u

Wende die Summenregel an:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= 2 (\int u^{2} d u - \int 11 d u)

\int u^{2} d u = \frac{u ^{3}}{3}

\int 11 d u = 11 u

= 2 (\frac{u ^{3}}{3} - 11 u)

Setze in

u = x + 11

ein

= 2 (\frac{( x + 11 ) ^{3}}{3} - 11 x + 11)

Vereinfache

2 (\frac{( x + 11 ) ^{3}}{3} - 11 x + 11) : 2 (\frac{1}{3} (x + 11)^{\frac{3}{2}} - 11 x + 11)

= 2 (\frac{1}{3} (x + 11)^{\frac{3}{2}} - 11 x + 11)

Füge eine Konstante zur Lösung hinzu

= 2 (\frac{1}{3} (x + 11)^{\frac{3}{2}} - 11 x + 11) + C

Graph

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