If A=(1,3,5,7,9) and B=(2,3,5,7), what is A∪B?
If A={x:x is a prime number} and
B={x:x≤10,x∈N}, then A∩B is ________ .
B={x:x≤10, x∈N}, then A∩B = ___.
If U = {1, 2, 3, 4, 5, 6, 7, 8, 9}, A = {2, 4, 6, 8} and B = {2, 3, 5, 7}, verify that
(i) (A∪B)′=A′∩B′
(ii) (A∩B)′=A′∪B′