A(1,0,1,), B(2,2,3), 則線段AB在直線L: (x+1)/2 = (y-1)/3 =(z+5)/6上投影之長度為?
答案 20/7
收錄日期: 2021-04-30 18:15:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140329000010KK00180