在处理常见的直线与圆锥曲线的动态型问题，直线与圆锥曲线之间的位置关系、数量关系及其他相关问题时，一般都是将其等价转换为一元二次方程，通过对方程根的判别式或根与系数的关系的讨论得以实现．有些动态型的解析几何问题，存在两个互相联系、互相制约的参变数，我们... When dealing with the dynamic type problems of common straight lines and conic curves, the positional relationship between the straight line and the conic section, the quantity relation, and other related problems, they are generally converted into a unitary quadratic equation through the root of the equation. The discussion of the discriminant or root-coefficient relationship is realized. Some dynamic analytical geometry problems, there are two interconnected, mutually constrained parametric variables, we ...