a.maths 題目黎..
希望大家可以幫我計個步驟出黎..
Find the equations of the circle,with its centre on the line 2x+y=0,passes through (2,-1)and touches the line x-y-1=0
ans
x^2+y^2-2x+4y+3=0
or
x^2+y^2-18x+36y+67=0
數學叻既人入黎！
2009-05-30 9:26 pm
回答 (1)
2009-05-30 9:38 pm
✔ 最佳答案
圖片參考：http://i601.photobucket.com/albums/tt95/physicsworld9999/physicsworld01May301337.jpg?t=1243661872
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參考: Physics king
收錄日期: 2021-04-19 14:24:52
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090530000051KK00802