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Яка з наведених множин буде декартовим добутком А × В множин A={1, 2, 3}, B={a,b}?
{{1, 2, 3}, {a, b}}
{(1, a), (2, a), (3, a), (1, b), (2, b), (3, b)}
{{A}, {B}}
{(a, 1), (a, 2), (a, 3), (b, 1), (b, 2), (b, 3)}
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