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不等式的证明是数学中极其魅力的问题.笔者发现,有一类不等式可以借用直线加以证明,现举例说明此证明方法,供同学们学习时参考.
Inequality is proved to be an extremely attractive problem in mathematics.I found that there is a class of inequalities can be borrowed to prove, is an example of this method of proof for students to learn reference.