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