解析几何在高考中占有重要地位,一般在倒数第二题或压轴题中安排一道大题.在平时学习及复习过程中,要让自己真正理解解析几何中的最优解法与算法,这样在考试中才能做出正确的、最优的解法选择,才能做到事半功倍.下面谈谈什么是“点差法”?什么情况下用“点差法”? Analytic geometry occupies an important position in the college entrance examination, usually in the penultimate or finale questions to arrange a big problem.In the usual learning and review process, let yourself really understand the analytic geometry of the optimal solution and algorithm, so in the exam In order to make the right, the optimal choice of solution, in order to achieve a multiplier. Now talk about what is the “spread method”? Under what circumstances “spread”?