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Answers for “为什么在两个集合之间关系的定义中使用有序对?”

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The video tests the less-than relation with two reversed ordered pairs: (2, 5) and (5, 2). It shows that 2<52 < 5 is true, so the pair (2, 5) belongs to the relation.

Conditions: The relation is the less-than symbol (<) on integers.; The pairs tested are (2, 5) and (5, 2).