Răspuns:
Explicație pas cu pas:
a) A∪B={1,2,3,4,5,6,7}; A∩B={3, 5}; A-B={1,6}
Deci A={3,5, 1,6} , iar B={3,5,2,4,7}
b) A∪B={a,b,c,d,e,f}; A∩B={a,c}; B-A={d,f}.
Deci A={a,c,b,e} iar B={a,c,d,f}.
c) A∪B={x∈N | x≤8}={0,1,2,3,4,5,6,7,8}; A∩B={2,3,5}
A∪{2,5,6}={0,1,2,3,5,6,7}; B∪{0,2,4}={0,2,3,4,5,6,8}
Deci A={0,2,3,5,1,7}, iar B={2,3,4,5,6,8}
