Cho \(\int\limits_2^5 {f(x)...

B

- Hướng dẫn giải

Ta có: \(\int\limits_5^2 {\left[ {2 - 4f(x)} \right]dx}  \)

\(=  - \int\limits_2^5 {2\,dx}  + 4\int\limits_2^5 {f\left( x \right)} \,dx\)

\(=  - \left( {2x} \right)\left| \begin{array}{l}_{}^5\\_2^{}\end{array} \right. + 4.10 \)

\(=  - \left( {10 - 4} \right) + 40 = 34\)