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判别式在中学数学中的应用的广泛性和重要性是众所周知的。中学数学教材中能用判别式解决的问题到处可见,有很多用其它数学方法来解十分繁琐的问题,有时用判别式法来解,则显得简捷、明快、利落,让人陶醉在数学美的感觉之中。关于判别式的应用,在很多文章中已有各种各样的介绍。本文仅就其在解析几何方面的两种应用介绍于下,供读者参考。
The breadth and importance of the use of discriminants in middle school mathematics is well known. The problems that can be solved by discriminative solutions in middle school mathematics textbooks can be seen everywhere. There are many problems with other mathematics methods that are very tedious. Sometimes they are solved with discriminative methods. They are simple, clear, neat, and let people feel intoxicated in the beauty of mathematics. Among them. With regard to the application of discriminants, various kinds of articles have been introduced. This article only introduces the two applications of analytical geometry in the following for readers’ reference.