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Câu hỏi: Cho $\int\limits_{0}^{2}{f\left( x \right)\text{d}x}=3$. Tính $\int\limits_{0}^{2}{\left[ f\left( x \right)+1 \right]\text{d}x}$ ?
A. $4$.
B. $5$.
C. $7$.
D. $1$.
Ta có : $\int\limits_{0}^{2}{\left[ f\left( x \right)+1 \right]\text{d}x}=\int\limits_{0}^{2}{f\left( x \right)\text{d}x}+\int\limits_{0}^{2}{\text{d}x}=3+2=5$.
A. $4$.
B. $5$.
C. $7$.
D. $1$.
Ta có : $\int\limits_{0}^{2}{\left[ f\left( x \right)+1 \right]\text{d}x}=\int\limits_{0}^{2}{f\left( x \right)\text{d}x}+\int\limits_{0}^{2}{\text{d}x}=3+2=5$.
Đáp án B.