integral from 0 to 1 of x*3(1-x)^2

Lösung

\int_{0}^{1} x \cdot 3 (1 - x)^{2} d x

\frac{1}{4}

Dezimale

0.25

Schritte zur Lösung

\int_{0}^{1} x \cdot 3 (1 - x)^{2} d x

Entferne die Konstante:

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

= 3 \cdot \int_{0}^{1} x (1 - x)^{2} d x

Multipliziere aus

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

= 3 \cdot \int_{0}^{1} x - 2 x^{2} + x^{3} 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

= 3 (\int_{0}^{1} x d x - \int_{0}^{1} 2 x^{2} d x + \int_{0}^{1} x^{3} d x)

\int_{0}^{1} x d x = \frac{1}{2}

\int_{0}^{1} 2 x^{2} d x = \frac{2}{3}

\int_{0}^{1} x^{3} d x = \frac{1}{4}

= 3 (\frac{1}{2} - \frac{2}{3} + \frac{1}{4})

Vereinfache

3 (\frac{1}{2} - \frac{2}{3} + \frac{1}{4}) : \frac{1}{4}

= \frac{1}{4}

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