If `A sub U`, prove that :
(i) `U' =phi` (ii) ` phi' =U` (iii) `(A')' =A ` (iv) ` A cup A' =U ` (v) `A cap A' =phi`

Prove that A cap (A cup B)'=phi .

Prove that A sub phi rArr A=phi

For any set A,B prove that A cap (B-A)=phi

Prove that A sub phi implies A =phi .

A cup phi =………..

Prove that : Acap(B-A)=phi (ii) (A-B)cap(B-A)=phi (iii) (A-B)cap(AcapB)=phi (iv) phi-A=phi .

If u is the universal set and A sub U then fill in the blanks : (i) A cup A' = ....... (ii) A cap A '=....... (iii) phi' cap A=..... (iv) U' cap A =........

A cup phi =……………..