Question

A universal set contains only sets A and B. If A∩B = Ø and A and B are not the empty set, then all of the following are true except


A and B are disjoint.
A is equal to B complement.
A∪B={}
A is not a subset of B.

Answer 1

what do the n and o symbols mean and what is an empty set

Answer 2

Well, all are true except because A and B are not the empty set

Answer 3

thank yu