- Union of two sets
The union of two sets is
everything in both sets. For example if you have the set {3,4,5}
and the set {5,6,7}, then the union of these two sets is {3,4,5,6,7}.
The symbol for union is a capital U. So mathematically, the above sentence
would read:
U {3,4,5} {5,6,7} = {3,4,5,6,7}
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