integral of ((x^2+2x-2))/(x^3-4x)

Lösung

\int \frac{( x ^{2} + 2 x - 2 )}{x ^{3} - 4 x} d x

\frac{1}{2} ln (∣ x + 2 ∣ ∣ x - 2 ∣) - \frac{1}{2} ln \frac{x}{2} + 1 + \frac{1}{2} ln \frac{x}{2} - 1 + 2 (\frac{1}{4} ln ∣ x ∣ - \frac{1}{8} ln ∣ x + 2 ∣ - \frac{1}{8} ln ∣ x - 2 ∣) + C

Schritte zur Lösung

\int \frac{x ^{2} + 2 x - 2}{x ^{3} - 4 x} d x

Multipliziere aus

\frac{x ^{2} + 2 x - 2}{x ^{3} - 4 x} : \frac{x ^{2}}{x ^{3} - 4 x} + \frac{2 x}{x ^{3} - 4 x} - \frac{2}{x ^{3} - 4 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{x ^{2}}{x ^{3} - 4 x} d x + \int \frac{2 x}{x ^{3} - 4 x} d x - \int \frac{2}{x ^{3} - 4 x} d x

\int \frac{x ^{2}}{x ^{3} - 4 x} d x = \frac{1}{2} ln (∣ x + 2 ∣ ∣ x - 2 ∣)

\int \frac{2 x}{x ^{3} - 4 x} d x = - \frac{1}{2} ln \frac{x}{2} + 1 + \frac{1}{2} ln \frac{x}{2} - 1

\int \frac{2}{x ^{3} - 4 x} d x = - 2 (\frac{1}{4} ln ∣ x ∣ - \frac{1}{8} ln ∣ x + 2 ∣ - \frac{1}{8} ln ∣ x - 2 ∣)

= \frac{1}{2} ln (∣ x + 2 ∣ ∣ x - 2 ∣) - \frac{1}{2} ln \frac{x}{2} + 1 + \frac{1}{2} ln \frac{x}{2} - 1 - (- 2 (\frac{1}{4} ln ∣ x ∣ - \frac{1}{8} ln ∣ x + 2 ∣ - \frac{1}{8} ln ∣ x - 2 ∣))

Vereinfache

= \frac{1}{2} ln (∣ x + 2 ∣ ∣ x - 2 ∣) - \frac{1}{2} ln \frac{x}{2} + 1 + \frac{1}{2} ln \frac{x}{2} - 1 + 2 (\frac{1}{4} ln ∣ x ∣ - \frac{1}{8} ln ∣ x + 2 ∣ - \frac{1}{8} ln ∣ x - 2 ∣)

Füge eine Konstante zur Lösung hinzu

= \frac{1}{2} ln (∣ x + 2 ∣ ∣ x - 2 ∣) - \frac{1}{2} ln \frac{x}{2} + 1 + \frac{1}{2} ln \frac{x}{2} - 1 + 2 (\frac{1}{4} ln ∣ x ∣ - \frac{1}{8} ln ∣ x + 2 ∣ - \frac{1}{8} ln ∣ x - 2 ∣) + C

\int - 6 e^{- 6 x} d x

\int \frac{3}{1000 + 2 t} d t

x \to 0 + lim (\frac{x - 2}{x})

\frac{d}{d x} (cos (2 x) + sin (2 x) + \frac{1}{5} e^{x})

in v erse l a pl a ce \frac{s}{( s - 3 ) ( s - 4 ) ( s - 12 )}