mace5834 mace5834 07-06-2023 Mathematics contestada Find the set A ∪ U. U={1, 2, 3, 4, 5, 6, 7, 8} A={4, 5, 7, 8} A. A ∪ U= (Use a comma to separate answers as needed.) B.A ∪ U is the empty set.