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在求解某些数学问题时,针对条件或结论中某式A的结构特征与内在联系,利用矛盾的对立统一性,探索构造与之匹配的式B,通过计算A+B、A-B、AB或A/B等来架设解题的通道,使问题迅速转化或解决的方法,称为构造对偶式法或配偶法。其中构造对偶式解题的一般模式为图1。
In solving certain mathematical problems, the structural features and internal relations of a formula A in the conditions or conclusions are explored by using the contradictory opposites of contradictions. By calculating A + B, AB, AB or A / B, etc. to set up a channel of problem solving, so that the problem can be rapidly transformed or solved, called the construction of dual or spouse law. The general mode in which duality problem solving is constructed is shown in Fig.1.