Respostas

2014-05-12T14:08:45-03:00
1/2, pois 0,499999.. arredondando fica 0,5
2 3 2
2014-05-12T14:18:51-03:00
X= 0,49999...
10x=4,9999...
100=49,999...

 x=\frac{49-4}{100-10}  \\  \\ x= \frac{45}{90} = \frac{1}{2  }  \\  \\ x= \frac{1}{2}
1 5 1