Sum
If A = {5, 6, 7, 8, 9}, B = {x : 3 < x < 8 and x ∈ W} and C = {x : x ≤ 5 and x ∈ N}.
Find: A ∪ B and (A ∪ B) ∪ C
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Solution
A = (5, 6, 7, 8, 9)
B = (4, 5. 6, 7)
C = (1, 2, 3, 4, 5)
A ∪ B = (4, 5, 6, 7, 8, 9)
(A ∪ B) ∪ C = (1, 2, 3, 4, 5, 6, 7, 8, 9)
Concept: Distributive Laws
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