\[\boxed{\text{241\ (241).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1)\ 20^{- 2} = \frac{1}{20^{2}} = \frac{1}{400}\]
\[2)\ {0,3}^{- 1} = \frac{1}{0,3} = \frac{10}{3} = 3\frac{1}{3}\]
\[3)\ ( - 6)^{- 3} = \frac{1}{( - 6)^{3}} = - \frac{1}{216}\]
\[4)\ \left( \frac{4}{7} \right)^{- 2} = \frac{7^{2}}{4^{2}} = \frac{49}{16} = 3\frac{1}{16}\]
\[5)\ \left( - \frac{1}{6} \right)^{- 3} = ( - 6)^{3} = - 216\]
\[6)\ \left( 3\frac{1}{3} \right)^{- 2} = \left( \frac{10}{3} \right)^{- 2} = \frac{3^{2}}{10^{2}} =\]
\[= \frac{9}{100} = 0,09\]