integral from a to b of x*1/(b-a)

Lösung

\int_{a}^{b} x \cdot \frac{1}{b - a} d x

\frac{b + a}{2}

Schritte zur Lösung

\int_{a}^{b} x \frac{1}{b - a} d x

Entferne die Konstante:

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

= \frac{1}{b - a} \cdot \int_{a}^{b} x d x

Wende die Potenzregel an

= \frac{1}{b - a} [\frac{x ^{2}}{2}]_{a}^{b}

Vereinfache

\frac{1}{b - a} [\frac{x ^{2}}{2}]_{a}^{b} : \frac{[ \frac{x ^{2}}{2} ] _{a}^{b}}{b - a}

= \frac{[ \frac{x ^{2}}{2} ] _{a}^{b}}{b - a}

Berechne die Grenzen:

\frac{b ^{2}}{2} - \frac{a ^{2}}{2}

= \frac{\frac{b ^{2}}{2} - \frac{a ^{2}}{2}}{b - a}

Vereinfache

= \frac{b + a}{2}

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