Răspuns:
3. A= { [tex]\frac{-2}{-4} =\frac{1}{2}[/tex] ; [tex]\frac{-2}{5} ; \frac{1}{-4} ; \frac{1}{5} ; \frac{3}{-4} ; \frac{3}{5}[/tex] }
4. A= { 23, 0 ,105}
B= { -9, -11, -18}
D= {23, 5/7, 0, 1/6, 29/14} orice nr care nu este negativ
E= C
F={23, 0, 105}
