摘要
数学中的参数,往往起到化难为易及化繁为简的作用,而参数方程中参数的选取,又是解一些轨迹题首要的任务。本文从不同的角度分别选取不同的参数,从而分别得到不同的参数方程,但可以证明,这些不同的参数方程却可以化成同一个普通方程。
Parameters in mathematics often play a role in turning knotty problems into simple ones. Choosing parameters in parametric equation is the first step to settle some locus items. This paper chooses various parameters from different perspectives and gets different parametric equations. It is proved that all these different parametric equations can be changed into a same common equation.
关键词
参数
参数方程
普通方程
parameter
parametric equation
common equation
