Tìm \(F(x) = \int {{\pi ^2}dx} \).
\(F(x) = {\pi ^2}x + C\)
\(F(x) = \frac{{{\pi ^2}{x^2}}}{2} + C\)
\(F(x) = 2\pi x + C\)
\(F(x) = \frac{{{\pi ^3}}}{3}\)
