Cho hàm số \(y=f\left( x \right)=\left\{ \begin{al...

Câu hỏi: Cho hàm số \(y=f\left( x \right)=\left\{ \begin{align}  3{{x}^{2}}\,\,khi\,\,0\le x\le 1 \\  4-x\,\,khi\,\,1\le x\le 2 \\ \end{align} \right.\). Tính tích phân \(\int\limits_{0}^{2}{f\left( x \right)dx}\).

A

 \(\frac{7}{2}\)                                                

B

 1                                            

C

 \(\frac{5}{2}\)                                                

D  \(\frac{3}{2}\)