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A uu phi=...

A uu phi=

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If A nn mu = mu and B uu phi = phi , then A uu B = "_____" .

If M is any set, then write M uu phi and M nn phi

If M is any set, then write M uu phi and M nn phi

What can you say about the set, A,B,if A uu B = phi

If A is a non-empty subset of a set E, then what is E uu ( ( A nn phi ) – (A – phi)) equal to ?

Prove the A uu B = A for all A implies B =phi

Prove that if A uu B=C and A nn B=phi , then A= C-B.

Prove the A uu B = U "and " A nn B = phi impliesB =A'

If A and B are two finite sets such that A nn B != phi , then n (A uu B) =

Let A and B be sets.If A nn X=B nn X=phi and A uu X=B uu X for some set X then how that A=B