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Question
If A = {6, 7, 8, 9}, B = {4, 6, 8,10} and C = {x : x ∈ N : 2 < x ≤ 7}; Find: A - (B ∪ C).
Sum
Solution
(B ∪ C) = {4, 6, 8, 10} ∪ {3, 4, 5, 6, 7}
= {3, 4, 5, 6, 7, 8,10}
A - (B ∪ C) = {6, 7, 8, 9} - {3, 4, 5, 6, 7, 8, 10}
= {9}
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Difference of Two Sets
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