Thread: Subsets that have a disjoint

How can I prove this:
and A and B are disjoint, the

Originally Posted by tigergirl

How can I prove this:
and A and B are disjoint, the

If are disjoint then .

after you answer your question in your other post, this follows directly from that - just write down the definition of disjoint sets, which is that their intersection is the empty set.