摘要
圆锥曲线弦是各类考试的重点和热点,常考常新,角度常变,久经不衰,且运算量大,技能性高。文章运用韦达定理和弦长公式推导了圆锥曲线焦点弦、顶点弦和准点弦长度的统一计算公式和几个重要推论,为解决圆锥曲线一些特殊弦长问题提供了理论依据。
Conic string is the focus of all kinds of test, which is often tested from different angles and the computation is complex and needs skills. The paper deduces a unified formula and several important inferences for calculating conic focus chord, vertex chord and punctuality chord length using Wada theorem and chord length formula which provides theoretical basis for solving the problem of some special conic chord length.
出处
《文山学院学报》
2014年第3期58-61,共4页
Journal of Wenshan University
关键词
圆锥曲线弦
计算方法
应用
Conic chord
calculating methods
application
