how to solve:
find the equation of a circle C2 which passes through the
pt(4,-1) and is tangent to the circle
C1:x square + y square +2x -6y +5=0 at B(1,2)
收錄日期: 2021-04-21 13:16:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070827000051KK03714