Integral dari $$$x + 2$$$

Temukan $$$\int \left(x + 2\right)\, dx$$$.

Integralkan suku demi suku:

$${\color{red}{\int{\left(x + 2\right)d x}}} = {\color{red}{\left(\int{2 d x} + \int{x d x}\right)}}$$

Terapkan aturan konstanta $$$\int c\, dx = c x$$$ dengan $$$c=2$$$:

$$\int{x d x} + {\color{red}{\int{2 d x}}} = \int{x d x} + {\color{red}{\left(2 x\right)}}$$

Terapkan aturan pangkat $$$\int x^{n}\, dx = \frac{x^{n + 1}}{n + 1}$$$ $$$\left(n \neq -1 \right)$$$ dengan $$$n=1$$$:

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

Oleh karena itu,

$$\int{\left(x + 2\right)d x} = \frac{x^{2}}{2} + 2 x$$

Sederhanakan:

$$\int{\left(x + 2\right)d x} = \frac{x \left(x + 4\right)}{2}$$

Tambahkan konstanta integrasi:

$$\int{\left(x + 2\right)d x} = \frac{x \left(x + 4\right)}{2}+C$$

$$$\int \left(x + 2\right)\, dx = \frac{x \left(x + 4\right)}{2} + C$$$A