\[\boxed{\text{1173.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[\textbf{а)}\frac{1}{10^{2}} = 10^{- 2}\]
\[\textbf{б)}\frac{1}{6^{7}} = 6^{- 7}\]
\[\textbf{в)}\frac{1}{x^{7}} = x^{- 7}\]
\[\textbf{г)}\frac{1}{y^{10}} = y^{- 10}\]
\[\textbf{д)}\ \frac{1}{7} = 7^{- 1}\]