A) A= |x| >9 => x= 10,11,12,.......infinit
B=-5<x<sau egal decat 8 =>x= -4,-3,-2,-1,0,1,2,3,4,5,6,7,8
A U B /A reunit B = -4,-3,-2,-1,0,1,2,3,4,5,6,7,8,10,11,12,....infinit
A n B /A intersectat B= multimea vida(nimic)
A/B sau A-B=A(elementele multimii A)
B/A sau B-A=B(elementele multimii B)
Faci la fel si la B
