Respostas

2014-05-01T10:10:40-03:00
2014-05-01T10:15:03-03:00
A )

x=3,111....
x=3+1/9
x=28/9

B )

x=0,323232.......*(10)
10x=3,232323...
10x=3+23/99
10x=320/99
990x=320

x=320/990
x=32/99