integral of (x+2)/(x^2+6x+10)

Lösung

\int \frac{x + 2}{x ^{2} + 6 x + 10} d x

\frac{1}{2} ln x^{2} + 6 x + 10 - arctan (x + 3) + C

Schritte zur Lösung

\int \frac{x + 2}{x ^{2} + 6 x + 10} d x

Vervollständige das Quadrat

x^{2} + 6 x + 10 : (x + 3)^{2} + 1

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

Wende U-Substitution an

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

Multipliziere aus

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

Wende die Summenregel an:

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

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

\int \frac{u}{u ^{2} + 1} d u = \frac{1}{2} ln u^{2} + 1

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

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

Setze in

u = x + 3

ein

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

Vereinfache

\frac{1}{2} ln (x + 3)^{2} + 1 - arctan (x + 3) : \frac{1}{2} ln x^{2} + 6 x + 10 - arctan (x + 3)

= \frac{1}{2} ln x^{2} + 6 x + 10 - arctan (x + 3)

Füge eine Konstante zur Lösung hinzu

= \frac{1}{2} ln x^{2} + 6 x + 10 - arctan (x + 3) + C

x y^{^{'}} + 3 y = \frac{( e ^{x} )}{x}

\frac{\partial}{\partial y} (5 x sin (y))

in v erse l a pl a ce 3 x^{2}

\int x^{- 3} d x

\frac{\partial}{\partial x} (e^{- (x^{7} + y^{7})})