(a)PQ is a chord of a circle of length 2 units and the centre of the circle is (-2,1). The
equation of PQ is x+2y-5=0. Find the equation of the circle
(b)Find the equations of the circles which touch both the coordinate axes and the line
3x+4y-12=0
2 amath questions
2007-12-23 8:35 pm
回答 (1)
2007-12-23 8:59 pm
✔ 最佳答案
As follows: 圖片參考：http://i238.photobucket.com/albums/ff245/chocolate328154/Maths060.jpg?t=1198385920
2007-12-23 13:02:57 補充：
Amendment:Q1( 4th line onwards ): r^2 - 1 = 5 r^2 = 6 Hence,( x + 2 )^2 + ( y - 1 )^2 = 6x^2 + y^2 + 4x - 2y - 1 = 0
參考: My Maths Knowledge
收錄日期: 2021-05-01 13:37:48
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https://hk.answers.yahoo.com/question/index?qid=20071223000051KK01395