Integral von $$$\frac{1}{3 y}$$$

Bestimme $$$\int \frac{1}{3 y}\, dy$$$.

Wende die Konstantenfaktorregel $$$\int c f{\left(y \right)}\, dy = c \int f{\left(y \right)}\, dy$$$ mit $$$c=\frac{1}{3}$$$ und $$$f{\left(y \right)} = \frac{1}{y}$$$ an:

$${\color{red}{\int{\frac{1}{3 y} d y}}} = {\color{red}{\left(\frac{\int{\frac{1}{y} d y}}{3}\right)}}$$

Das Integral von $$$\frac{1}{y}$$$ ist $$$\int{\frac{1}{y} d y} = \ln{\left(\left|{y}\right| \right)}$$$:

$$\frac{{\color{red}{\int{\frac{1}{y} d y}}}}{3} = \frac{{\color{red}{\ln{\left(\left|{y}\right| \right)}}}}{3}$$

Daher,

$$\int{\frac{1}{3 y} d y} = \frac{\ln{\left(\left|{y}\right| \right)}}{3}$$

Fügen Sie die Integrationskonstante hinzu:

$$\int{\frac{1}{3 y} d y} = \frac{\ln{\left(\left|{y}\right| \right)}}{3}+C$$

$$$\int \frac{1}{3 y}\, dy = \frac{\ln\left(\left|{y}\right|\right)}{3} + C$$$A