Câu 33:
Biết ∫12f(x)dx=3\int\limits_{1}^{2}{f\left( x \right)\text{d}x}=31∫2f(x)dx=3, ∫15f(x)dx=4\int\limits_{1}^{5}{f\left( x \right)\text{d}x}=41∫5f(x)dx=4. Tính ∫25(2f(x)+x)dx\int\limits_{2}^{5}{\left( 2f\left( x \right)+x \right)\text{d}x}2∫5(2f(x)+x)dx
