反证法是数学中一种很重要的间接证明问题的方法,一些难于从正面证明的问题,利用反证法往往能够很简明地得到解决.它的基本原理是先否定命题的结论,然后运用逻辑推理的方法推导出矛盾的结果,从而证明原命题的正确.同学们对运用反证法证题感到困难, Proof-of-evidence is a very important method of indirectly proving problems in mathematics, and some problems that are difficult to prove from the positive are often solved concisely by using the law of proof.Its basic principle is to first reject the conclusion of the proposition and then use the method of logical reasoning Deduced contradictory results, thus proving the correctness of the original proposition.The students were difficult to apply the proof of the syndrome,