Question

Для множеств А= {-3,-2,-1,0,1,2,3}, В={3,5,7} и С={2,4,5} найдите:
1)(А ∩ B) ∩ C;
2)(A ∩ B) U C;
3) (A U B ) ∩ C 

Answer 1

1)(А ∩ B) ∩ C;
A ∩ B = {3} ∩ C = Пустое множество

2)(A ∩ B) U C;
A ∩ B = {3} U C = {2,3,4,5}

3)(A U B ) ∩ C;
A U B = {-3,-2,-1,0,1,2,3,5,7} ∩ C = {2,5}