离心率是圆锥曲线的一个特别重要的知识点,求解圆锥曲线离心率的取值范围,是平面解析几何中的重难点,其自然会成为高考考查的重点。就求解圆锥曲线离心率取值范围提出一些方法见解。 Centrifugal rate is a particularly important point of knowledge of conic. The range of conic curve eccentricity is a heavy and difficult point in plane analytic geometry, which will naturally become the focus of college entrance examination. Some solutions to the coning curve range of centrifugal values ​​are proposed.