Question

Se 3x=2 o valor de 3-x/2

Answer 1

${3}^{- \: \frac{x}{2}} = \: \sqrt{{3}^{ - x}} = \: \sqrt{{({3}^{x})}^{- 1}} = \: \sqrt{{2}^{- 1}} = \: \sqrt{\frac{1}{2}} = \: \frac{1}{\sqrt{2}}$

- Radicalizando:

$\frac{1}{\sqrt{2}} = \: \frac{ \sqrt{2} }{ \sqrt{2}. \sqrt{2} } = \: \frac{ \sqrt{2} }{2}$