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Câu hỏi: Cho hàm số $f\left( x \right)={{x}^{2}}$. Khẳng định nào dưới đây đúng?
A. $\int{f\left( x \right)\text{d}x}=2x+C$.
B. $\int{f\left( x \right)\text{d}x}=\dfrac{{{x}^{3}}}{3}+C$.
C. $\int{f\left( x \right)\text{d}x}={{x}^{3}}+C$.
D. $\int{f\left( x \right)\text{d}x}=3{{x}^{3}}+C$.
Ta có $\int{f\left( x \right)\text{d}x}=\int{{{x}^{2}}\text{d}x}=\dfrac{{{x}^{3}}}{3}+C$.
A. $\int{f\left( x \right)\text{d}x}=2x+C$.
B. $\int{f\left( x \right)\text{d}x}=\dfrac{{{x}^{3}}}{3}+C$.
C. $\int{f\left( x \right)\text{d}x}={{x}^{3}}+C$.
D. $\int{f\left( x \right)\text{d}x}=3{{x}^{3}}+C$.
Ta có $\int{f\left( x \right)\text{d}x}=\int{{{x}^{2}}\text{d}x}=\dfrac{{{x}^{3}}}{3}+C$.
Đáp án B.