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Beliebt Rechnen >

integral of (2x-3)/(x^2+3x+2)

Lösung

\int \frac{2 x - 3}{x ^{2} + 3 x + 2} d x

Lösung

- 5 ln ∣ x + 1 ∣ + 7 ln ∣ x + 2 ∣ + C

Schritte zur Lösung

\int \frac{2 x - 3}{x ^{2} + 3 x + 2} d x

Ermittle den Partialbruch von

\frac{2 x - 3}{x ^{2} + 3 x + 2} : - \frac{5}{x + 1} + \frac{7}{x + 2}

= \int - \frac{5}{x + 1} + \frac{7}{x + 2} 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

= - \int \frac{5}{x + 1} d x + \int \frac{7}{x + 2} d x

\int \frac{5}{x + 1} d x = 5 ln ∣ x + 1 ∣

\int \frac{7}{x + 2} d x = 7 ln ∣ x + 2 ∣

= - 5 ln ∣ x + 1 ∣ + 7 ln ∣ x + 2 ∣

Füge eine Konstante zur Lösung hinzu

= - 5 ln ∣ x + 1 ∣ + 7 ln ∣ x + 2 ∣ + C

Graph

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