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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: B - B.
Solution
A = {6, 7, 8, 9}
B = {4, 6, 8, 10}
C = {x : x ∈ N : 2 < x ≤ 7}
= {3, 4, 5, 6, 7}
B - B = {4, 6, 8, 10} - {4, 6, 8, 10}
= Φ
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