如果已知兩圓方程,how to find the 公切線方程+ 公共弦方程,
最好俾example,thx
amaths problem(circle)
2009-02-18 1:57 am
回答 (1)
2009-02-18 3:31 am
✔ 最佳答案
Let the equations of the 2 circles be X = 0 and Y = 0.So equation of common chord is X - Y = 0.
For equation of common tangents, it is quite complicated to explain here.
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https://hk.answers.yahoo.com/question/index?qid=20090217000051KK01096