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ping shi me qiu dai shu shi de zhi
Author(s): 
Pages: 40-41
Year: Issue:  Z2
Journal: Required Reading for Junior Middle School Students

Keyword:  已有条件非负数二次根式原式凭什么求值立方和公式已知条件分解因式不等式组;
Abstract: <正>在初中阶段,我们会遇到很多求代数式的值的问题.求值是需要条件的.有些题目看起来好像无条件,实际上只不过是隐含了条件.怎样利用已有条件、挖掘出隐含的条件是求代数式值的关键.条件可以分为以下几类:一、以相反数、倒数的性质为条件
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