設兩歪斜線L1:x=0t, y=t, z=2t+1 t為實數,與x軸的公垂線為L
, 則L的參數式為?公垂線段長為?
收錄日期: 2021-04-30 18:33:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140308000015KK03049