愛情小天使 19-9-2005 19:48
Form 5 Maths
Equation of circle C: x^2+y^2-6x+2y-3
Centre: (3,-1)
Radius: root 13
Given a point Q (-1,1)
Show that Q lies outside C.
kristiano 21-9-2005 00:08
因為r= root13
centre C(3,-1)
Distance QC=root(16+4)=root20>r
所以Q就在C出面
kung仔 21-9-2005 15:07
[quote]Originally posted by [i]kristiano[/i] at 2005-9-21 00:08:
因為r= root13
centre C(3,-1)
Distance QC=root(16+4)=root20>r
所以Q就在C出面 [/quote]
高人= =