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数学解题过程中常常会根据需要设变量,而某些变量作为解题的纽带,并不需要求出变量的结果,只是通过某种关系去表示变量间的联系,从而得到需要的结论,我们把这种方法称为“设而不求”.如能恰当地运用“设而不求”的策略,就可以减少运算量,简化解题过程.用这种方法解题时,要能觉察所设变量与所求问题之间的联系,从而达到不求变量的值就能解答问题的目的.也就是说,合理地“设”出变量
In mathematics problem-solving process, variables are often set according to need. Some variables are used as a solution to the problem, and do not need to find out the result of the variables. Instead, we can express the relationship between variables through some kind of relationship and get the necessary conclusions. This method is called “If you can properly use ” set instead of seeking “strategy, you can reduce the amount of computation, to simplify the problem-solving process.In this way to solve the problem, To be able to detect the set variables and the relationship between the asked questions, so as to achieve the purpose of solving the problem without seeking the value of the variable. In other words, a reasonable ”set" variables