Respostas

2014-03-17T14:36:46-03:00
\boxed{3^{-0,5}~\to~ 3^{ -\frac{1}{2} }~\to~ \frac{1}{3^{ \frac{1}{2} }} ~\to~ \frac{1}{ \sqrt{3} } . \frac{ \sqrt{3} }{ \sqrt{3} } ~\to~ \frac{ \sqrt{3} }{3} ~\to~0,57735}

Lembrando que \boxed{3^{0,5}~\to~ \sqrt{3} ~\to~1,73205}

Alternativa E