Nếu \(\int\limits_{0}^{1}{f\left( x \right)}\text{d}x=4\) thì \int\limits_{0}^{1}{2f\left( x \right)}\text{d}x\)

Câu hỏi :

Nếu \(\int\limits_{0}^{1}{f\left( x \right)}\text{d}x=4\) thì \(\int\limits_{0}^{1}{2f\left( x \right)}\text{d}x\) bằng