1. The union of
set A and
set B contains all the elements that are in A, in B, or in both.
2. The union of the sets {1, 2, 3} and {3, 4, 5} is {1, 2, 3, 4, 5}.
3. In mathematics, the symbol ∪ is used to represent the union of two sets. For example, A ∪ B means the union of
set A and set B.