Respuesta :

[tex]\bf a^{\frac{ n}{ m}} \implies \sqrt[ m]{a^ n} \qquad \qquad \sqrt[ m]{a^ n}\implies a^{\frac{ n}{ m}} \\\\\\ a^{-\frac{ n}{ m}} \implies \cfrac{1}{a^{\frac{ n}{ m}}} \implies \cfrac{1}{\sqrt[ m]{a^ n}} \qquad\qquad % radical denominator \cfrac{1}{\sqrt[ m]{a^ n}}= \cfrac{1}{a^{\frac{ n}{ m}}}\implies a^{-\frac{ n}{ m}} \\\\ -------------------------------\\\\ 2y^{-\frac{2}{7}}\implies 2\cdot \cfrac{1}{y^{\frac{2}{7}}}\implies 2\cdot \cfrac{1}{\sqrt[7]{y^2}}\implies \cfrac{2}{\sqrt[7]{y^2}}[/tex]

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