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Beliebt Rechnen >

integral of (5x^3-8x+5)/(x^3-x^2)

Lösung

\int \frac{5 x ^{3} - 8 x + 5}{x ^{3} - x ^{2}} d x

Lösung

5 x + 3 ln ∣ x ∣ + \frac{5}{x} + 2 ln ∣ x - 1 ∣ + C

Schritte zur Lösung

\int \frac{5 x ^{3} - 8 x + 5}{x ^{3} - x ^{2}} d x

Ermittle den Partialbruch von

\frac{5 x ^{3} - 8 x + 5}{x ^{3} - x ^{2}} : 5 + \frac{3}{x} - \frac{5}{x ^{2}} + \frac{2}{x - 1}

= \int 5 + \frac{3}{x} - \frac{5}{x ^{2}} + \frac{2}{x - 1} 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 5 d x + \int \frac{3}{x} d x - \int \frac{5}{x ^{2}} d x + \int \frac{2}{x - 1} d x

\int 5 d x = 5 x

\int \frac{3}{x} d x = 3 ln ∣ x ∣

\int \frac{5}{x ^{2}} d x = - \frac{5}{x}

\int \frac{2}{x - 1} d x = 2 ln ∣ x - 1 ∣

= 5 x + 3 ln ∣ x ∣ - (- \frac{5}{x}) + 2 ln ∣ x - 1 ∣

Vereinfache

= 5 x + 3 ln ∣ x ∣ + \frac{5}{x} + 2 ln ∣ x - 1 ∣

Füge eine Konstante zur Lösung hinzu

= 5 x + 3 ln ∣ x ∣ + \frac{5}{x} + 2 ln ∣ x - 1 ∣ + C

Graph

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\int \frac{16}{x ^{2} + 4} d x

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