\[2;8;32;\ldots\]
\[b_{1} = 2;\ \ \ q = \frac{8}{2} = 4\]
\[S_{5} = \frac{b_{1}\left( 1 - q^{5} \right)}{1 - 4} = \frac{2 \cdot \left( 1 - 4^{5} \right)}{- 3} =\]
\[= 682.\]
\[Ответ:682.\]