Q9. Using properties of sets, show that
(ii) A ( A
B ) = A
This can be solved as follows
(ii) A ( A
B ) = A
A ( A
B ) = (A
A)
( A
B )
A ( A
B ) = A
( A
B ) { A
( A
B ) = A proved in 9(i)}
A ( A
B ) = A