integral of (2+x^8)^48x^7

Lösung

\int (2 + x^{8})^{4} 8 x^{7} d x

8 (2 x^{8} + 2 x^{16} + x^{24} + \frac{x ^{32}}{4} + \frac{x ^{40}}{40}) + C

Schritte zur Lösung

\int (2 + x^{8})^{4} \cdot 8 x^{7} d x

Entferne die Konstante:

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

= 8 \cdot \int (2 + x^{8})^{4} x^{7} d x

Multipliziere aus

(2 + x^{8})^{4} x^{7} : 16 x^{7} + 32 x^{15} + 24 x^{23} + 8 x^{31} + x^{39}

= 8 \cdot \int 16 x^{7} + 32 x^{15} + 24 x^{23} + 8 x^{31} + x^{39} 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

= 8 (\int 16 x^{7} d x + \int 32 x^{15} d x + \int 24 x^{23} d x + \int 8 x^{31} d x + \int x^{39} d x)

\int 16 x^{7} d x = 2 x^{8}

\int 32 x^{15} d x = 2 x^{16}

\int 24 x^{23} d x = x^{24}

\int 8 x^{31} d x = \frac{x ^{32}}{4}

\int x^{39} d x = \frac{x ^{40}}{40}

= 8 (2 x^{8} + 2 x^{16} + x^{24} + \frac{x ^{32}}{4} + \frac{x ^{40}}{40})

Füge eine Konstante zur Lösung hinzu

= 8 (2 x^{8} + 2 x^{16} + x^{24} + \frac{x ^{32}}{4} + \frac{x ^{40}}{40}) + C

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