Tìm nguyên hàm \(F\left( x...

Câu hỏi: Tìm nguyên hàm \(F\left( x \right) = \int {{\pi ^2}} {\rm{d}}x\).

A. \(F\left( x \right) = {\pi ^2}x + C\)

B. \(F\left( x \right) = 2\pi x + C\)

C. \(F\left( x \right) = \frac{{{\pi ^3}}}{3} + C\)

D. \(F\left( x \right) = \frac{{{\pi ^2}{x^2}}}{2} + C\)