Integraal van $$$y^{2} - 1$$$

Bepaal $$$\int \left(y^{2} - 1\right)\, dy$$$.

Integreer termgewijs:

$${\color{red}{\int{\left(y^{2} - 1\right)d y}}} = {\color{red}{\left(- \int{1 d y} + \int{y^{2} d y}\right)}}$$

Pas de constantenregel $$$\int c\, dy = c y$$$ toe met $$$c=1$$$:

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

Pas de machtsregel $$$\int y^{n}\, dy = \frac{y^{n + 1}}{n + 1}$$$ $$$\left(n \neq -1 \right)$$$ toe met $$$n=2$$$:

$$- y + {\color{red}{\int{y^{2} d y}}}=- y + {\color{red}{\frac{y^{1 + 2}}{1 + 2}}}=- y + {\color{red}{\left(\frac{y^{3}}{3}\right)}}$$

Dus,

$$\int{\left(y^{2} - 1\right)d y} = \frac{y^{3}}{3} - y$$

Voeg de integratieconstante toe:

$$\int{\left(y^{2} - 1\right)d y} = \frac{y^{3}}{3} - y+C$$

$$$\int \left(y^{2} - 1\right)\, dy = \left(\frac{y^{3}}{3} - y\right) + C$$$A