Cho . Khi đó bằng:

* Hướng dẫn giải

\(J = \int\limits_0^2 {\left[ {4f\left( x \right) - 3} \right]{\rm{d}}x} = 4\int\limits_0^2 {f\left( x \right){\rm{d}}x} - 3\int\limits_0^2 {{\rm{d}}x} = 4.3 - \left. {3x} \right|_0^2 = 6\)