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

Lösung

\int \frac{1}{x ( 1 + x )} d x

2 (ln x - ln x + 1) + C

Schritte zur Lösung

\int \frac{1}{x ( 1 + x )} d x

Wende U-Substitution an

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

Entferne die Konstante:

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

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

Ermittle den Partialbruch von

\frac{1}{u ( u + 1 )} : \frac{1}{u} - \frac{1}{u + 1}

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

\int \frac{1}{u} d u = ln ∣ u ∣

\int \frac{1}{u + 1} d u = ln ∣ u + 1 ∣

= 2 (ln ∣ u ∣ - ln ∣ u + 1 ∣)

Setze in

u = x

ein

= 2 (ln x - ln x + 1)

Füge eine Konstante zur Lösung hinzu

= 2 (ln x - ln x + 1) + C

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

\frac{d}{d x} (cos^{3} (x^{2} - 1))

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

y^{^{''}} + 15 y^{^{'}} + 54 y = 0

f (x) = (x + 2)^{\frac{2}{3}}