• The proof by contradiction is one of the most important methods of proving propositions in mathematics.

    如何有效地提高和改进反证法教学,摆在中学数学教师面前的一个重要课题。

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  • The proof is by contradiction. Suppose each real number could be given its own room.

    这样论证自相矛盾的。

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  • The proof is by contradiction. Suppose each real number could be given its own room.

    这样论证自相矛盾的。

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