" For any two sets "A" and "B" ,prove that: "A nn B=phi rArr A sube B'

For any two sets A and B, prove that A nn B=varphi rArr A sube B'

For any two sets A and B prove that A nn (AuuB)=A

For any two sets A and B, prove that A nn B sub A

For any two sets A and B prove that A-B=A nn B'

For any two sets A and B prove that : A nn B sube A

For any two sets A and B prove that : A-B sube A

Use logical method to prove the following : For any two sets A and B prove that A - B = phi iff A subseteq B

For any two sets A and B prove that : B sube A uu B

For any two sets A and B prove that : A sube A uu B

For any two sets A and B, prove that A uu B=A nn B hArr A=B