integral from 1 to 2 of 2xe^x

Lösung

\int_{1}^{2} 2 x e^{x} d x

2 e^{2}

Dezimale

14.77811 \dots

Schritte zur Lösung

\int_{1}^{2} 2 x e^{x} d x

Entferne die Konstante:

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

= 2 \cdot \int_{1}^{2} x e^{x} d x

Wende die partielle Integration an

= 2 [e^{x} x - \int e^{x} d x]_{1}^{2}

\int e^{x} d x = e^{x}

= 2 [e^{x} x - e^{x}]_{1}^{2}

Berechne die Grenzen:

e^{2}

= 2 e^{2}

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