摘要
曲线族的包络线的一般求法 ,运用起来有时比较复杂 ,费时费力且容易出错。本文给出了在一些特殊场合下的特殊求法 ,使得运算大大简化。
Envelore of family of cuves generality put to use some times complex n eed or use great effort eary make mistakes .This paper given some special term s pecial seek way .can be used arithmetic greatly simplify.
