ex 1,dau 30 puncte.

Răspuns:
A ∪ B = {-[tex]-\sqrt{2}; 5; \frac{3}{4}; 2,(3); \sqrt{3,1} , -\frac{2}{9}[/tex]}
A ∩ B = {[tex]5; 2,(3)[/tex]}
A \ B = {[tex]-\sqrt{2} ; \frac{3}{4}[/tex]}
B \ A = {[tex]\sqrt{3,1} ; -\frac{2}{9}[/tex]}