A={2,3,4,5,6,7}
B={1,2,3,...,+inf}
C={1}
A intersectat B={2,3,4,5,6,7}
C intersectat B={1}
A intersectat C=mult. vida(nu se regaseste nici un element comun)
(A reunit B)-(A reunit C)={1,2,3,4,...,+inf}-{1,2,3,4,5,6,7}={8,9,10,...,+inf}
(A-B)intersectat(B-C)={8,9,10,...,+inf} intersectat {2,3,4,...,+inf}={8,9,10,...,+inf}
sper ca te am ajutat
coronita?
