sets and its operations

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If A = {1, 2, 3} and B = {3, 4, 5}, what is A ∪ B ?

{1, 2, 3, 4, 5}

If A = {2, 4, 6} and B = {4, 5, 6}, what is A ∩ B ?

{4, 6}

If A = {1, 2} and B = {1, 2, 3, 4}, then A is ______ of B

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