Answer
{1,2,3,4,5,6,7,8,10}
Work Step by Step
The union of sets A and B is the set of elements that are members
of set A or of set B or of both sets. Elements in either {1,3,5,7} or {2,4,6,8,10} or both include {1,2,3,4,5,6,7,8,10}
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