\(\bf a^{\frac{{ n}}{{ m}}} \implies \sqrt[{ m}]{a^{ n}} \qquad \qquad
\sqrt[{ m}]{a^{ n}}\implies a^{\frac{{ n}}{{ m}}}\qquad thus\\
----------------------------\\\\
say\implies \sqrt[6]{216}\implies \sqrt[6]{6^3}\implies 6^{\frac{3}{6}}\implies 6\frac{1}{2}\implies \sqrt{6}\)
you tell us
