含参量方程的求解常常要依据参变量在给定范围内分类讨论,而分类必须按照一定的逻辑原则,分类要做到既不遗漏又不重复,一般都比较复杂,但若能适当结合函数图象分析,往往能化 The solution of parametric equations is often based on the classification and discussion of the parametric variables within a given range. The classification must be based on certain logical principles. The classification should be done so as to be neither omission nor duplication. Generally, it is more complicated, but if it can be properly combined with the function graph Like analysis, often can be