高次方程根的问题是高考中的常考题.主要考查直接解方程和求方程根的个数这两方面的问题,要求考生具有较强的分析问题和解决问题的能力.对此,许多同学常常束手无策.本文介绍一些常用方法供大家参考.一、巧用函数图象例1关于x的方程(x2-1)2-|x2-1|+k=0,给出下列4个命题:1存在实数k,使得方程恰有2个不同的实根;2存在实数k,使得方程恰有4个不同的 The root of the high-order equation is the usual test questions in the college entrance examination.The main test directly solve equations and equation root number of these two issues, requiring candidates to have a strong analysis of the problem and problem-solving skills .To this, many students Often useless ways. This article describes some of the commonly used methods for your reference. A clever use of function images Example 1 on the x equation (x2-1) 2- | x2-1 | + k = 0, given the following four propositions: 1 There is a real number k such that there are exactly 2 different real roots in the equation; 2 there is a real number k such that exactly 4 different