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Beliebt Rechnen >

integral of (4x^2+3x+4)/((x^2+1)^2)

Lösung

\int \frac{4 x ^{2} + 3 x + 4}{( x ^{2} + 1 ) ^{2}} d x

Lösung

4 arctan (x) - \frac{3}{2 ( x ^{2} + 1 )} + C

Schritte zur Lösung

\int \frac{4 x ^{2} + 3 x + 4}{( x ^{2} + 1 ) ^{2}} d x

Ermittle den Partialbruch von

\frac{4 x ^{2} + 3 x + 4}{( x ^{2} + 1 ) ^{2}} : \frac{4}{x ^{2} + 1} + \frac{3 x}{( x ^{2} + 1 ) ^{2}}

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

\int \frac{4}{x ^{2} + 1} d x = 4 arctan (x)

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

= 4 arctan (x) - \frac{3}{2 ( x ^{2} + 1 )}

Füge eine Konstante zur Lösung hinzu

= 4 arctan (x) - \frac{3}{2 ( x ^{2} + 1 )} + C

Graph

Beliebte Beispiele

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

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