\(X=\dfrac{\sqrt[3]{m}}{m^2\cdot\sqrt[5]{m}}=\dfrac{m^{\dfrac{1}{3}}}{m^2\cdot m^{\dfrac{1}{5}}}=\dfrac{m^{\dfrac{1}{3}}}{m^{\dfrac{11}{5}}}=m^{\dfrac{1}{3}-\dfrac{11}{5}}=m^{-\dfrac{28}{15}}\)
\(a=\dfrac{1}{\sqrt[3]{m^2}}=\dfrac{1}{m^{\dfrac{2}{3}}}=m^{-\dfrac{2}{3}}\)
\(a^{\dfrac{14}{5}}=\left(m^{-\dfrac{2}{3}}\right)^{\dfrac{14}{5}}=m^{-\dfrac{2}{3}\cdot\dfrac{14}{5}}=m^{-\dfrac{28}{15}}=X\)
=>Chọn D
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