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The union set, denoted by the symbol ( \cup ), represents a set that contains all the elements from two or more sets without duplication. For example, if set A = {1, 2, 3} and set B = {3, 4, 5}, the union of sets A and B, written as ( A \cup B ), would be {1, 2, 3, 4, 5}. Essentially, it combines all unique elements from the involved sets.

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