integral 1/((sqrt(x)+2))

Lösung

integral

\frac{1}{( x + 2 )}

2 (x + 2 - 2 ln x + 2) + C

Schritte zur Lösung

\int \frac{1}{x + 2} d x

Wende U-Substitution an

= \int \frac{2 ( u - 2 )}{u} d u

Entferne die Konstante:

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

= 2 \cdot \int \frac{u - 2}{u} d u

Multipliziere aus

\frac{u - 2}{u} : 1 - \frac{2}{u}

= 2 \cdot \int 1 - \frac{2}{u} d u

Wende die Summenregel an:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= 2 (\int 1 d u - \int \frac{2}{u} d u)

\int 1 d u = u

\int \frac{2}{u} d u = 2 ln ∣ u ∣

= 2 (u - 2 ln ∣ u ∣)

Setze in

u = x + 2

ein

= 2 (x + 2 - 2 ln x + 2)

Füge eine Konstante zur Lösung hinzu

= 2 (x + 2 - 2 ln x + 2) + C

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