integral from 1 to 2 of x/(x^2+3)

Lösung

\int_{1}^{2} \frac{x}{x ^{2} + 3} d x

\frac{1}{2} ln (7) - ln (2)

Dezimale

0.27980 \dots

Schritte zur Lösung

\int_{1}^{2} \frac{x}{x ^{2} + 3} d x

Wende U-Substitution an

= \int_{4}^{7} \frac{1}{2 u} d u

Entferne die Konstante:

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

= \frac{1}{2} \cdot \int_{4}^{7} \frac{1}{u} d u

Nutze das gemeinsame Integral :

\int \frac{1}{u} d u = ln (∣ u ∣)

= \frac{1}{2} [ln ∣ u ∣]_{4}^{7}

Berechne die Grenzen:

ln (7) - 2 ln (2)

= \frac{1}{2} (ln (7) - 2 ln (2))

Vereinfache

= \frac{1}{2} ln (7) - ln (2)

\int_{0}^{4} 8 x - 32 d x

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