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A Math Futher Problems on Locus
2008-07-14 3:41 am
回答 (1)
2008-07-14 5:16 am
✔ 最佳答案
In both of the two questions, a theorem in Geometry is used:When two circles touch each other, the point of contact lies on the st. line joining the two centres.=====
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2008-07-13 21:20:46 補充：
In 9, there is a typing mistake.
the answer should be x^2 + 2ry - r^2 = 0
收錄日期: 2021-04-23 23:05:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080713000051KK02362