[tex] \frac{6}{2n+1}\ apartine\ lui\ Z=\ \textgreater \ 2n+1|6 \\ =\ \textgreater \ 2n+1\ apartine\ divizorilor\ lui\ 6 \\ =\ \textgreater \ 2n+1 = (1,2,3,-1,-2,-3)^-^1 \\ =\ \textgreater \ 2n=(0,1,2,-2,-3,-4)^:^2 \\ =\ \textgreater \ n=(0,1,-1,-2)[/tex]
