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Suppose U = {1, 3, 9, 11, 13, 18, 19}, and B = {3, 9, 11, 13}. Find (B’)’ and draw the inference. |
Answer» U = {1, 3, 9, 11, 13, 18, 19}, B= {3, 9, 11, 13} ….(i) ∴ B’= {1, 18, 19} (B’)’= {3, 9, 11, 13} ….(ii) ∴ (B’)’ = B … [From (i) and (ii)] ∴ Complement of a complement is the given set itself. |
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