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Beliebt Rechnen >

integral of 2xln(x-2)

Lösung

\int 2 x ln (x - 2) d x

Lösung

2 (ln (x - 2) (\frac{1}{2} (x - 2)^{2} + 2 (x - 2)) - \frac{1}{4} (x^{2} + 4 x - 12)) + C

Schritte zur Lösung

\int 2 x ln (x - 2) d x

Entferne die Konstante:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 2 \cdot \int x ln (x - 2) d x

Wende U-Substitution an

= 2 \cdot \int (u + 2) ln (u) d u

Wende die partielle Integration an

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

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

= 2 (ln (u) (\frac{u ^{2}}{2} + 2 u) - \frac{1}{2} (\frac{u ^{2}}{2} + 4 u))

Setze in

u = x - 2

ein

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

Vereinfache

2 (ln (x - 2) (\frac{( x - 2 ) ^{2}}{2} + 2 (x - 2)) - \frac{1}{2} (\frac{( x - 2 ) ^{2}}{2} + 4 (x - 2))) : 2 (ln (x - 2) (\frac{1}{2} (x - 2)^{2} + 2 (x - 2)) - \frac{1}{4} (x^{2} + 4 x - 12))

= 2 (ln (x - 2) (\frac{1}{2} (x - 2)^{2} + 2 (x - 2)) - \frac{1}{4} (x^{2} + 4 x - 12))

Füge eine Konstante zur Lösung hinzu

= 2 (ln (x - 2) (\frac{1}{2} (x - 2)^{2} + 2 (x - 2)) - \frac{1}{4} (x^{2} + 4 x - 12)) + C

Graph

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