Posted by Fakaapo. Suetusi on Thursday, March 29, 2012 at 5:30am.
1. A ⊇ B , B is a subset of A
2. not familiar with the operator in sets
3. Did not know that "-" was an operator with sets
I assume 2) is intersection
If the intersection of A and B = A, then A is a subset of B.
A-B is the members of A that are not in B. If that is equal to A, then B is empty.
Hmmm. On that last one, A-B=A means that A and B are disjoint, or B is empty.
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