A = (-inf , 0)
B = [-5 ; 3)
C = (2 ; +inf)
a) AUB = (-inf ; 3)
AUC = (-inf ; +inf)
BUC = [-5 ; 3)
b) AnB = [-5 ; 0)
AnC = Ø
BnC = (2 ; 3)
c) A\B = (-inf ; -5)
B\A = [0 ; 3)
A\C = (-inf ; 0)
C\A = (2 ; +inf)
B\C = [-5 ; 2]
C\B = [3 ; +inf)
d) (AnB)\(CnA) = [-5 ; 0) \ Ø = [-5 ; 0)
e) AUBUC = (-inf ; 3)U[-5 ; 3) = (-inf ; 3)