integral of x^3ln(x^2+3)

Lösung

\int x^{3} ln (x^{2} + 3) d x

\frac{1}{4} x^{4} ln (x^{2} + 3) - \frac{1}{2} (\frac{x ^{4}}{4} - \frac{3 x ^{2}}{2} + \frac{9}{2} ln x^{2} + 3) + C

Schritte zur Lösung

\int x^{3} ln (x^{2} + 3) d x

Wende die partielle Integration an

= \frac{1}{4} x^{4} ln (x^{2} + 3) - \int \frac{x ^{5}}{2 ( x ^{2} + 3 )} d x

\int \frac{x ^{5}}{2 ( x ^{2} + 3 )} d x = \frac{1}{2} (\frac{x ^{4}}{4} - \frac{3 x ^{2}}{2} + \frac{9}{2} ln x^{2} + 3)

= \frac{1}{4} x^{4} ln (x^{2} + 3) - \frac{1}{2} (\frac{x ^{4}}{4} - \frac{3 x ^{2}}{2} + \frac{9}{2} ln x^{2} + 3)

Füge eine Konstante zur Lösung hinzu

= \frac{1}{4} x^{4} ln (x^{2} + 3) - \frac{1}{2} (\frac{x ^{4}}{4} - \frac{3 x ^{2}}{2} + \frac{9}{2} ln x^{2} + 3) + C

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