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的教学,是摆在中学数学教师面前的一个重要课题。
The proof is by contradiction. Suppose each real number could be given its own room.
这样的论证是自相矛盾的。
The proof is by contradiction. Suppose each real number could be given its own room.
这样的论证是自相矛盾的。
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