Cho hàm số f ( x ) thỏa mãn ∫ − 2 1 f ( x ) d x = 2 . Tính ∫ − 2 1 ( 1 + f ( x ) ) d x 1 . &#x

Chọn D

{\displaystyle \underset{-2}{\overset{1}{\int }}\left(1+f\left(x\right)\right)dx}={\displaystyle \underset{-2}{\overset{1}{\int }}1dx}+{\displaystyle \underset{-2}{\overset{1}{\int }}f\left(x\right)dx}={x|}_{-2}^1+2=1-(-2)+2=5.