\[\left( \frac{9}{2} \right)^{- 3};\ \frac{2}{9} = \left( \frac{9}{2} \right)^{- 1};\ \left( \frac{2}{9} \right)^{- 3} = \left( \frac{9}{2} \right)^{3};\text{\ \ }\left( \frac{9}{2} \right)^{0}\]
\[\left( \frac{9}{2} \right)^{- 3} < \left( \frac{9}{2} \right)^{- 1} < \left( \frac{9}{2} \right)^{0} < \left( \frac{9}{2} \right)^{3}\]
\[\left( \frac{9}{2} \right)^{- 3} < \frac{2}{9} < \left( \frac{9}{2} \right)^{0} < \left( \frac{2}{9} \right)^{- 3}.\]