integral of 1/(x+x(ln(x^2)))

Lösung

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

\frac{1}{2} ln ∣ 2 ln (x) + 1 ∣ + C

Schritte zur Lösung

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

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

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

Vereinfache

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

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

Wende U-Substitution an

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

Entferne die Konstante:

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

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

Nutze das gemeinsame Integral :

\int \frac{1}{u} d u = ln (∣ u ∣)

= \frac{1}{2} ln ∣ u ∣

Setze in

u = ln (x^{2}) + 1

ein

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

Wende log Regel an

lo g_{a} (x^{b}) = b \cdot lo g_{a} (x),

angenommen

x \geq 0

= \frac{1}{2} ln ∣ 2 ln (x) + 1 ∣

Füge eine Konstante zur Lösung hinzu

= \frac{1}{2} ln ∣ 2 ln (x) + 1 ∣ + C

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