Question

calcule o valor de 8 elevado a -1/2 é urgente me ajudem por favor!!!!

Answer 1

$8^{-\frac{1}{2}}\\\\\left(\frac{1}{8}\right)^{\frac{1}{2}}\\\\\frac{\sqrt{1}}{\sqrt{8}}\\\\racionalizando:\\\\\frac{1}{\sqrt{8}}.\frac{\sqrt{8}}{\sqrt{8}}\\\\\frac{\sqrt{8}}{\sqrt{8}^2}\\\\\frac{\sqrt{2^2.2}}{8}\\\\\frac{2\sqrt{2}}{8}\\\\\frac{\sqrt{2}}{4}$