Google
Câu hỏi: Nếu $\int\limits_{2}^{3}{f\left( x \right)}dx=1,\int\limits_{2}^{3}{g\left( x \right)}dx=4,thi\int\limits_{2}^{3}{\left[ 2f\left( x \right)-g\left( x \right) \right]}dx$ bằng
A. $1$.
B. $5$.
C. $-2$.
D. $-1$.
A. $1$.
B. $5$.
C. $-2$.
D. $-1$.
Ta có: $\int\limits_{2}^{3}{f\left( x \right)}dx=1,\int\limits_{2}^{3}{g\left( x \right)}dx=4,thi\int\limits_{2}^{3}{\left[ 2f\left( x \right)-g\left( x \right) \right]}dx$ $=2.1-4=-2$
Đáp án C.