Question

a={1,2,3,4,5}
b={1,3}
c={5,6,7}
Aub,Auc,Buc,Anc,Anb,Bnc,A-b,A-C,C-a
B-c,C-b,Aubuc,Anbnc


​

Answer 1

Aub={1,2,3,4,5}
Auc={1,2,3,4,5,6,7}
Buc={1,3,5,6,7}
Anc={5}
Bnc={ mulțime vida}
A-b={2,4,5}
A-c={1,2,3,4}
C-a={6,7}
B-C={1,3}
C-b={5,6,7}
Aubuc={1,2,3,4,5,6,7}
Anbnc={mulțime vida}