Răspuns:
Explicație pas cu pas:
0,(3) = 3/9 = 1/3
(1/3)^2 = 1/9
4/3 - 1/9 = 12/9 - 1/9 = 11/9
4/3 *11/9 = 44/27
44/27 : 44/9 = 44/27*9/44 = 1/3
4/3 - 1/3 = 3/3 = 1
n = 1 = numar natural
