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Beliebt Rechnen >

integral of (x+3)sqrt(8-x)

Lösung

\int (x + 3) 8 - x d x

Lösung

\frac{2}{5} (8 - x)^{\frac{5}{2}} - \frac{22}{3} (8 - x)^{\frac{3}{2}} + C

Schritte zur Lösung

\int (x + 3) 8 - x d x

Wende U-Substitution an

= \int - u (- u + 11) d u

Entferne die Konstante:

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

= - \int u (- u + 11) d u

Multipliziere aus

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

= - \int - u^{\frac{3}{2}} + 11 u 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

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

\int u^{\frac{3}{2}} d u = \frac{2}{5} u^{\frac{5}{2}}

\int 11 u d u = \frac{22}{3} u^{\frac{3}{2}}

= - (- \frac{2}{5} u^{\frac{5}{2}} + \frac{22}{3} u^{\frac{3}{2}})

Setze in

u = 8 - x

ein

= - (- \frac{2}{5} (8 - x)^{\frac{5}{2}} + \frac{22}{3} (8 - x)^{\frac{3}{2}})

Vereinfache

= \frac{2}{5} (8 - x)^{\frac{5}{2}} - \frac{22}{3} (8 - x)^{\frac{3}{2}}

Füge eine Konstante zur Lösung hinzu

= \frac{2}{5} (8 - x)^{\frac{5}{2}} - \frac{22}{3} (8 - x)^{\frac{3}{2}} + C

Graph

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