integral of (x^2-2x)*x^{-3}

Lösung

\int (x^{2} - 2 x) \cdot x^{- 3} d x

ln ∣ x ∣ + \frac{2}{x} + C

Schritte zur Lösung

\int (x^{2} - 2 x) x^{- 3} d x

Vereinfache

(x^{2} - 2 x) x^{- 3} : \frac{x - 2}{x ^{2}}

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

Multipliziere aus

\frac{x - 2}{x ^{2}} : \frac{1}{x} - \frac{2}{x ^{2}}

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

\int \frac{1}{x} d x = ln ∣ x ∣

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

= ln ∣ x ∣ - (- \frac{2}{x})

Vereinfache

= ln ∣ x ∣ + \frac{2}{x}

Füge eine Konstante zur Lösung hinzu

= ln ∣ x ∣ + \frac{2}{x} + C

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