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平面解析几何是一门研究点的运动变化规律的学科,圆锥曲线中的范围问题或最值问题较为常见,所涉及的知识面也较为广泛,是教师和学生都感觉较为棘手的一个难点。下面就几个常见的最值问题谈几个常见的解决方法。一、圆锥曲线上的任一点与圆锥曲线对称轴上某一定点的距离的最值问题求圆锥曲线上任一点到某一定点的距离的最值问题,可借助“点在曲线上”实现变量统一,将横纵坐标两个变量中的一个用另一个表示,构造关于其中一个坐标的二次函数求最值。
Plane analytic geometry is a disciplinary discipline that studies the law of motion variation. The conic curves are the most common problems in scope or value, and they involve a wide range of aspects of knowledge. It is a difficult point for teachers and students to feel more difficult. Here are a few common value problems to talk about several common solutions. First, the conic point of any point and the conical symmetry axis of a fixed point distance of the most value Problem Any point on the conic curve to a certain point of the distance the value of the problem, with the help of “point on the curve” to achieve Uniform variables, the horizontal and vertical coordinates of one of two variables, said another, construct the quadratic function on one of the coordinates of the maximum value.