Question

Fração irredutível dízima periódica 1,111..

Answer 1

x = 1,111....
10x = 10 x 1,111... = 11,111...

9x = 10x - x = 11,111... - 1,111... = 10
9x = 10
x = 10/9

Answer 2

1,11111...

11-1/9=10/9