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一元二次方程和二次函数有着密切的联系,根据一元二次方程实数根分布的区间范围情况,利用对应的二次函数,并借助相应的辅助图象,可以确定一元二次方程中参数的取值范围或满足条件的某些参数的值.下面分类予以解析.一、二次项系数为常数时,参数含于一次项或常数项1.方程有一根大于α,另一根小于α,解答时既可以利用函数与方程的联系求解,也可
The quadratic equation of one element is closely related to the quadratic function. According to the interval range of the real number root distribution of the quadratic equation, the corresponding quadratic function is used, and with the aid of the corresponding auxiliary image, the parameters of the quadratic equation can be determined. The range of values or the values of certain parameters satisfying the conditions. The following classification is to be resolved. When the coefficients of the quadratic term are constant, the parameters are contained in one term or constant term 1. The equation has one greater than α and the other less than α. When solving, both the function and equation can be used to solve the problem.