Google
Câu hỏi: Rút gọn biểu thức $P={{x}^{\dfrac{3}{2}}}.\sqrt[5]{x}$
A. ${{x}^{\dfrac{13}{2}}}$.
B. ${{x}^{\dfrac{4}{7}}}$.
C. ${{x}^{\dfrac{3}{10}}}$.
D. ${{x}^{\dfrac{17}{10}}}$.
A. ${{x}^{\dfrac{13}{2}}}$.
B. ${{x}^{\dfrac{4}{7}}}$.
C. ${{x}^{\dfrac{3}{10}}}$.
D. ${{x}^{\dfrac{17}{10}}}$.
Ta có $P={{x}^{\dfrac{3}{2}}}.\sqrt[5]{x}={{x}^{\dfrac{3}{2}}}.{{x}^{\dfrac{1}{5}}}={{x}^{\dfrac{3}{2}+\dfrac{1}{5}}}={{x}^{\dfrac{17}{10}}}$.
Đáp án D.