integral from 1 to 25 of 1/(1+sqrt(x))

Lösung

\int_{1}^{25} \frac{1}{1 + x} d x

2 (4 - ln (3))

Dezimale

5.80277 \dots

Schritte zur Lösung

\int_{1}^{25} \frac{1}{1 + x} d x

Wende U-Substitution an

= \int_{2}^{6} \frac{2 ( u - 1 )}{u} d u

Entferne die Konstante:

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

= 2 \cdot \int_{2}^{6} \frac{u - 1}{u} d u

Multipliziere aus

\frac{u - 1}{u} : 1 - \frac{1}{u}

= 2 \cdot \int_{2}^{6} 1 - \frac{1}{u} d u

Wende die Summenregel an:

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

= 2 (\int_{2}^{6} 1 d u - \int_{2}^{6} \frac{1}{u} d u)

\int_{2}^{6} 1 d u = 4

\int_{2}^{6} \frac{1}{u} d u = ln (3)

= 2 (4 - ln (3))

\int_{1}^{\infty} \frac{1}{n ^{3}}

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