If A={2,3,5}. Find `A cup phi and phi cup A` and compare.

If A={6,9,11}, B={}. Find A cup phi .

If A={0,2,4}, find A cap phi and A cap A . Comment.

If A={1,2,3,4} and B={2,4,6,8}. Find A cup B

If A={1,2,3,4} and B={1,2,3,4,5,6,7,8}, then find A cup B and A cap B . What do you notice about the result?

Let A={x:x in R, x^(2) -5x+6=0} and B={x:x in R, x^(2)=9 } i. Write A and B in roster form. ii. Find A cup B and A cap B. Find A-B, B-A and verify that (A-B) cup (B-A)=(A cup B)-(A cap B).

Let A and B be sets. If A cap X=B cap X= phi and A cup X=B cup X for some set X, show that A=B. (Hints A=A cap (A cup X), B=B cap (B cup X) and use distributive law)

If A - B =phi phi and B-A = phi then what can we conclude ?

Let A={2,5,6,8} and B={5,7,9,1}. Find A cup B

For A={x : x in Z, -2 lt x le 4}. B={x : x in W, x le 5}, C={-4,-1,0,2,3,4} " verify "A cup (B nn C) =(A cup B) nn (A cup C) .

Let U={1,2,3,4,5,6,7,8}, A={2,4,6,8} and B={2,4,8} a.Find A' and B' b. Also find (A cup B)' c. Verify (A cup B)=A' cap B'