Решебник по алгебре 9 класс Мерзляк Задание 899

\[\boxed{\mathbf{899\ (899).\ }Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ 64,\ 24,\ 9\ldots\ \ \ \ \ \ \ \]

\[q = \frac{24}{64} = \frac{3}{8}\text{\ \ }\]

\[S = \frac{64}{1 - \frac{3}{8}} = \frac{64}{\frac{5}{8}} = \frac{64 \cdot 8}{5} =\]

\[= 102,4.\]

\[2) - 396;330;\ - 275;\ldots\ \ \ \]

\[q = - \frac{330}{396} = - \frac{5}{6}\ \]

\[S = - \frac{396}{1 + \frac{5}{6}} = - \frac{396}{\frac{11}{6}} =\]

\[= \frac{- 396 \cdot 6}{11} = - 36 \cdot 6 = - 216.\ \]