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標題: [math]equations of circles [打印本頁]

作者: conqueror 時間: 2007-1-19 01:54 AM 標題: [math]equations of circles

Equations of circles are not functions.They are equations in two unkowns.Isn't it?

作者: 野孩子 時間: 2007-1-19 08:01 PM

I am not too clear of wat u are asking?

作者: Eraser 時間: 2007-1-25 08:28 PM

let co-ordinate of centre of circle be (a,b)

radius of circle be r

equation of this circle is (x-a)^2+(y-b)^2=r^2

作者: conqueror 時間: 2007-1-26 11:40 PM 標題: 回復#2

I am asking whether equations of circles are functions.

作者: 007and911 時間: 2007-5-16 08:57 AM 標題: 回復 #4 conqueror 的帖子

they are two function
f(x):x^2+Ax+B
g(x):y^2+Dy+E
circle:x^2+y^2+Ax+Dy+(B+E)

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