Integraal van $$$\frac{1}{x^{2} y}$$$ met betrekking tot $$$y$$$

Bepaal $$$\int \frac{1}{x^{2} y}\, dy$$$.

Pas de constante-veelvoudregel $$$\int c f{\left(y \right)}\, dy = c \int f{\left(y \right)}\, dy$$$ toe met $$$c=\frac{1}{x^{2}}$$$ en $$$f{\left(y \right)} = \frac{1}{y}$$$:

$${\color{red}{\int{\frac{1}{x^{2} y} d y}}} = {\color{red}{\frac{\int{\frac{1}{y} d y}}{x^{2}}}}$$

De integraal van $$$\frac{1}{y}$$$ is $$$\int{\frac{1}{y} d y} = \ln{\left(\left|{y}\right| \right)}$$$:

$$\frac{{\color{red}{\int{\frac{1}{y} d y}}}}{x^{2}} = \frac{{\color{red}{\ln{\left(\left|{y}\right| \right)}}}}{x^{2}}$$

Dus,

$$\int{\frac{1}{x^{2} y} d y} = \frac{\ln{\left(\left|{y}\right| \right)}}{x^{2}}$$

Voeg de integratieconstante toe:

$$\int{\frac{1}{x^{2} y} d y} = \frac{\ln{\left(\left|{y}\right| \right)}}{x^{2}}+C$$

$$$\int \frac{1}{x^{2} y}\, dy = \frac{\ln\left(\left|{y}\right|\right)}{x^{2}} + C$$$A