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Нехай A = {2,5,7}. Знайдіть A 2

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Нехай A = {2,5,7}. Знайдіть A²

A²= {(2,2),(2,5),(2,7),(5,2),(5,5),(5,7),(7,2),(7,5),(7,7)}

✅

A²= {(7,2),(7,5),(7,7)}

❌

A²= {(2,2),(5,5),(7,7)}

❌

A²= {(2,2),(2,5),(2,7)}

❌

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