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Mathematics for IGCSE & O level - Sets (Section 2 - No. 45)

If U = {1, 2, 3, 4, 5}, A = {1, 2}, and B = {2, 3, 4}, what is (A ∩ B)'?
{1, 2, 3, 4}
{1, 3, 4, 5}
{5}
{}

Объяснение

A ∩ B = {2}. (A ∩ B)' = {1, 3, 4, 5}

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