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函数、方程、不等式是每年高考考查的热点问题,这类问题往往含有常量、参数、变量等多个量(统称为元素),按照常规思路来处理这类多元问题,学生找不到解题切入的方向,解题往往半途而废,推算常常无果而终.其实在多元问题中,主元与次元是相对的,它们是辩证统一的,突破思维定势,需根据解题需要,转换角度和思维方式,对主元进行合理选定.本文选择从七个视角出发,在纷繁复杂的元素关系中理清头绪,使难题迎刃而解.
Functions, equations and inequalities are the hot topics in the college entrance examination every year. Such questions often contain many variables (collectively referred to as elements), such as constants, parameters and variables. Students can not find solutions to these multiple problems according to common ideas In fact, the multiple elements of the problem, the main element and the second element is relative, they are dialectical unity, breaking the mindset, according to the need to solve the problem, the conversion point of view and thinking Way, the main element of a reasonable choice.This article chooses from seven perspectives, in the complicated relationship between the elements to clear up the clue, so that the puzzle solved.