[" (i) If "A nn B'=O/" then ",],[[" (a) "A sube B," (b) "B sube A],[" (c) "A Delta B=A," (d) "A Delta B=O/]]

If A nn B= O/ . Prove that A - B = A

If A = B' , then (A nn B)' is "____" .

If A and B are two sets then A nn(B Delta C)=(A nn B)Delta(A nn C)

Prove that : (i) (A nn B) sub A (ii) (A nn B) sub B .

Prove that (i) A nn B sube A( ii) A nn B sube B( iii) If C sube A and C subebar(B), then C sube A nn B( iv )A=B rArr A nn C=B nn C for any set C, (v) If B sube A, then A nn B=B and conversely.

If A and B are two sets, then (A uu B') nn (A' nn B) is equal to

If A sub B and A sup C then A nn B nn C= "_______" .

If A and B are two sets then A nn(B-C)=(A nn B)-(A nn C)