[tex]5 \leqslant x < 10[/tex]
=> x = {5, 6, 7, 8, 9}, deci C = {5, 6, 7, 8, 9}
[tex]2y + 3 \leqslant 27[/tex]
[tex]y \leqslant \frac{27 - 3}{2} [/tex]
[tex]y \leqslant 12[/tex]
y aparține N* => y este diferit de 0
D = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
Răspuns corect: b)
