Integral of $$$f^{2}$$$
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Your Input
Find $$$\int f^{2}\, df$$$.
Solution
Apply the power rule $$$\int f^{n}\, df = \frac{f^{n + 1}}{n + 1}$$$ $$$\left(n \neq -1 \right)$$$ with $$$n=2$$$:
$${\color{red}{\int{f^{2} d f}}}={\color{red}{\frac{f^{1 + 2}}{1 + 2}}}={\color{red}{\left(\frac{f^{3}}{3}\right)}}$$
Therefore,
$$\int{f^{2} d f} = \frac{f^{3}}{3}$$
Add the constant of integration:
$$\int{f^{2} d f} = \frac{f^{3}}{3}+C$$
Answer
$$$\int f^{2}\, df = \frac{f^{3}}{3} + C$$$A