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Beliebt Rechnen >

integral of x/((sqrt(9+x^2))^3)

Lösung

\int \frac{x}{( 9 + x ^{2} ) ^{3}} d x

Lösung

\frac{x ^{2}}{9 9 + x ^{2}} - \frac{1}{9} 9 + x^{2} + C

Schritte zur Lösung

\int \frac{x}{( 9 + x ^{2} ) ^{3}} d x

Wende Exponentenregel an:

(a^{n})^{m} = a^{n \cdot m}

(9 + x^{2})^{3} = (9 + x^{2})^{\frac{3}{2}}

= \int \frac{x}{( 9 + x ^{2} ) ^{\frac{3}{2}}} d x

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

= \int \frac{x}{( 9 ( 1 + \frac{x ^{2}}{9} ) ) ^{\frac{3}{2}}} d x

Wende die partielle Integration an

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

\int \frac{x}{9 9 + x ^{2}} d x = \frac{1}{9} 9 + x^{2}

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

Füge eine Konstante zur Lösung hinzu

= \frac{x ^{2}}{9 9 + x ^{2}} - \frac{1}{9} 9 + x^{2} + C

Graph

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