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高考试卷解析几何中的求过定点或定值问题是高考重点考查内容,如2013年高考有陕西T20﹑江西T20等.解析几何的难点之一是运算量往往非常大,而且这个难点很不容易突破,是广大考生非常纠结的问题.本文给出一个神奇的方法,能非常简单解决这一类问题.神奇之处有两点:(1)运算量少(从而出错机会少).(2)联立方程不是消元,而化为齐次式(亲,估计您从未见识过).
Examination of the papers in the analysis of geometric fixed or fixed point is the subject of the college entrance examination test content, such as the 2013 college entrance examination in Shaanxi T20 ﹑ Jiangxi T20, etc. One of the difficulties in analytic geometry is the amount of computation is often very large, and this difficulty is not easy Breakthrough, is the majority of candidates very tangled issues.This article gives a magical way, can be very simple to solve this type of problem.There are two magical points: (1) less computation (and thus less error opportunities.) (2) The simultaneous equation is not elimination, but into homogeneous (pro, it is estimated that you have never seen before).