Question

A=[-3,+ infinit)
B=[-5,7)
C = {1,2,3}
Calculaţi :
AUB, AΠB,AUC, AΠC,BUC,BΠC,

Answer 1

    
[tex]A=[-3,~+\infty) \\ B=[-5,~7) \\ C = \{1,~2,~3\} \\ \\ A\bigcup B=[-5,~+\infty) \\ A \bigcap B =[-3,~7) \\ A \bigcup C = A ~~deoarece~~ C \subset A\\ A \bigcap C =C ~~deoarece~~ C \subset A \\ B \bigcup C = B ~~deoarece~~ C \subset B \\ B \bigcap C = C ~~deoarece~~ C \subset B [/tex]