在各种中学数学杂志上,经常看到同行对圆锥曲线的研究,发现了许多圆锥曲线的统一性质.教学之余,笔者也发现了圆锥曲线一个统一性质,现介绍如下:定义经过圆锥曲线的焦点,引轴的垂线,交圆锥曲线于P,Q两点,则线段PQ叫圆锥曲线的通径.性质1过椭圆xa22+by22=1(ab0)的焦点F垂直于长 In a variety of high school mathematics magazines, I often see colleagues on the conic curve, found a number of conic properties of a unified nature. In addition to teaching, I also found a conic curve of a unified nature, are introduced as follows: The definition of conic Focus, the vertical axis, the intersection of conic curve at P, Q two points, then the line PQ called the diameter of the conic curve. Nature 1 oval xa22 + by22 = 1 (ab0) focus F perpendicular to the long