Respostas

2013-11-18T12:47:44-02:00
2013-11-18T12:54:08-02:00
3^{2} -  3^{- 2} =

9 -  1   =
     3²
9 -  1   =
      9
mmc = 9
81 - 1 =
   9

80    ou 8,88888...
 9