integral from 0 to 1 of 9x^8(8-x^9)

Lösung

\int_{0}^{1} 9 x^{8} (8 - x^{9}) d x

\frac{15}{2}

Dezimale

7.5

Schritte zur Lösung

\int_{0}^{1} 9 x^{8} (8 - x^{9}) d x

Entferne die Konstante:

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

= 9 \cdot \int_{0}^{1} x^{8} (8 - x^{9}) d x

Multipliziere aus

x^{8} (8 - x^{9}) : 8 x^{8} - x^{17}

= 9 \cdot \int_{0}^{1} 8 x^{8} - x^{17} d x

Wende die Summenregel an:

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

= 9 (\int_{0}^{1} 8 x^{8} d x - \int_{0}^{1} x^{17} d x)

\int_{0}^{1} 8 x^{8} d x = \frac{8}{9}

\int_{0}^{1} x^{17} d x = \frac{1}{18}

= 9 (\frac{8}{9} - \frac{1}{18})

Vereinfache

9 (\frac{8}{9} - \frac{1}{18}) : \frac{15}{2}

= \frac{15}{2}

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