Integral of $$$r^{4}$$$
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Your Input
Find $$$\int r^{4}\, dr$$$.
Solution
Apply the power rule $$$\int r^{n}\, dr = \frac{r^{n + 1}}{n + 1}$$$ $$$\left(n \neq -1 \right)$$$ with $$$n=4$$$:
$${\color{red}{\int{r^{4} d r}}}={\color{red}{\frac{r^{1 + 4}}{1 + 4}}}={\color{red}{\left(\frac{r^{5}}{5}\right)}}$$
Therefore,
$$\int{r^{4} d r} = \frac{r^{5}}{5}$$
Add the constant of integration:
$$\int{r^{4} d r} = \frac{r^{5}}{5}+C$$
Answer
$$$\int r^{4}\, dr = \frac{r^{5}}{5} + C$$$A
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