Preciso da Resposta por favor me ajudem.
X = 0,212121...
10X = 2,1212121...
100X = 21,212121...
100X - X = 21,212121... - 0,212121...
99X = 21
X = 21/99
X = 7/33 → Resposta
21/99
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X = 0,212121...
10X = 2,1212121...
100X = 21,212121...
100X - X = 21,212121... - 0,212121...
99X = 21
X = 21/99
X = 7/33 → Resposta
21/99