Câu 33:

Cho $\int\limits_{0}^{1}{f\left( x \right)\text{d}x}=2$ và $\int\limits_{0}^{1}{g\left( x \right)\text{d}x}=5$, khi đó $\int\limits_{0}^{1}{\left[ f\left( x \right)+2g\left( x \right) \right]\text{d}x}$ bằng