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Mathematics for IGCSE & O level - Sets (Section 1 - No. 3)

Given the universal set U = {1, 2, 3, 4, 5} and sets A = {1, 2} and B = {3, 4}. What is (A ∪ B)'?
{5}
{1, 2, 3, 4}
{1, 2}
{3, 4, 5}

ব্যাখ্যা

(A∪B) = {1,2,3,4}, therefore, (A∪B)'={5}.

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