Question

Найти A∪B; A∩B; AB; BA; A B; (AB) (A∩B) , если A= {1,4,5,6} B= {2,4,6}

Answer 1

A∪B={1,2,4,5,6}
A∩B={4,6}
AB={1,5}
BA={2}
A*B={(1,2),(1,4),(1,6),(4,2),(4,4),(4,6),(5,2),(5,4),(5,6),(6,2),(6,4),(6,6)}
(AB)*(A∩B)={1,5}*{4,6}={(1,4),(1,6),(5,4),(5,6)}