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在高三复习与调研考试中,常常涉及到一类多变量的范围问题,部分问题的难度非常大,常规方法难以凑效,让一些同学望而生畏.作为最经典的方法,配方法在处理这类问题时却可能收到奇效.由于问题中所涉及的变量较多,直接利用配凑的方法进行配方很难进行,这时可以选择其中一个变量作为主元进行配方,然后逐次再配其它元,这种主元逐次配方法就是通常所说的“拉格朗日配方法”.下面就“拉格朗日配方法”的应用
In the third year of the review and research examinations, often involves a range of multivariate problems, some of the difficulties is very large, difficult to work with conventional methods, so that some students daunting.As the most classic method, with the method of dealing with this type of problem However, it may receive miraculous effects.Due to the large number of variables involved in the problem, it is very difficult to formulate the formula directly with the method of compounding. In this case, one of the variables can be selected as the main element to formulate, Kind of principal element successive allocation method is commonly referred to as “Lagrange matching method.” The following on the “Lagrange matching method” application