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初中代数教学中,经常遇到一些与多元有关的求代数式值的问题。解答它们,难度较大,方法因题而异。下面以近年来的竞赛题为例,介绍若干技巧,供参考.
In junior high school algebra teaching, we often encounter some problems related to multivariate seeking algebraic values. Answering them is more difficult and the method varies from question to question. Here is an example of a competition in recent years, introducing a number of techniques for reference.