(UNB) A expressão $\phantom{X}\left({\large 2}\,^{1/2}\right)^{-\,1/2}\phantom{X}$ equivale a:
a)
$\phantom{X}\sqrt{2}\phantom{X}$
b)
$\phantom{X}\sqrt[4]{2}\phantom{X}$
d)
$\phantom{X}\sqrt{\dfrac{1}{\sqrt{2}}}\phantom{X}$
c)
$\phantom{X}\dfrac{1}{\sqrt{2}}\phantom{X}$
e)
nenhuma das anteriores
