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

Lösung

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

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

Schritte zur Lösung

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

Wende U-Substitution an

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

Entferne die Konstante:

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

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

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

\int u^{2} d u = \frac{u ^{3}}{3}

\int 1 d u = u

= \frac{1}{2} (\frac{u ^{3}}{3} - u)

Setze in

u = 2 x + 1

ein

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

Vereinfache

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

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

Füge eine Konstante zur Lösung hinzu

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

x \to 2 lim ((3 - x) (x + 1))

\frac{\partial}{\partial x} (\frac{5}{x y} - 4 x^{2} - 2 y^{2})

\int \frac{1}{x ^{2} - 4 x + 8} d x

d er i v a t i v e f (x) = (x)^{3}

x \to 0 lim (\frac{( x + 1 ) ^{2} - 1}{x})