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椭圆、双曲线称为有心圆锥曲线,简称有心锥线,其离心率为之主要特征参数,在解决有心锥线的诸多问题(特别是涉及曲线上的点与焦点关系的问题)时,离心率e起着重要作用.离心率问题是高考中久考不衰的热点,本文仅就涉及率心率的若干常见问题例析如下:一、求离心率及其范围【例1】求
The ellipse and hyperbola are called concentric conic curves, abbreviated as the conic heart line, and the eccentricity is the main characteristic parameter. When solving many problems of the conic heart line (especially those involving the relationship between the point and the focus on the curve), the eccentricity is e plays an important role. Eccentricity problem is a hot spot in the college entrance exam. This article only analyzes several common problems involving rate heart rate as follows: 1. Find the eccentricity and its range [Example 1]