论文部分内容阅读
圆锥曲线的离心率是描述曲线形状的一个很重要的量,它在有关圆锥曲线问题中以参变量的形式出现,确定它的取值范围,就是根据问题条件,建立关于离心率e的不等式,通过解不等式达到解决问题的目的。下面就确定离心率范围的常用策略作一简析。
The eccentricity of the conic curve is a very important quantity to describe the shape of the curve. It appears as a parameter in the question about the conic curve. To determine its range of values, it is to establish an inequality about the eccentricity e according to the problem conditions. Solve the problem by solving inequalities. The following is a brief analysis of common strategies for determining the range of eccentricity.