反证法初探

• 作 者: 郁原鲁
• 出 处: 天津教育
• 发表日期: 1981年03期
• 关键词: 已知条件 否定命题 原命题 证法 角的对边 题设 平分线 否定形式 非负整数 声点

数学中有些命题难于用直接证法来证,这时可用间接证法来证明,反证法就是间接证法的一种。一、怎样正确运用反证法运用反证法来证题,其具体过程可分如下四步: (1)从已知条件和原命题结论不成立的假设出发,即否定命题结论 A B C;

Some propositions in mathematics are difficult to prove with direct evidence. Indirect evidence can be used to prove that counter-evidence is a kind of indirect evidence. First, how to correctly use anti-evidence method to use the anti-evidence method to testify, the specific process can be divided into the following four steps: (1) starting from the assumption that the known conditions and the original proposition conclusion is not established, that is, the negative conclusion of the proposition A B C;