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已知圆的方程x2+y2-6x-6y+14=0,求过点A(-3,-5)的直线交圆的弦PQ的中点M的轨迹方程
人气:493 ℃ 时间:2020-01-31 13:46:31
解答
M(x,y)
C:x^2+y^2-6x-6y+14=0
C(3,3)
k(AM)*k(CM)=-1
[(y+5)/(x+3)]*[(y-3)/(x-3)=-1
x^2+(y+1)^2=25
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