摘要:已知点A(0.1)及圆.C为圆B上任意一点.求AC垂直平分线与线段BC的交点P的轨迹方程.
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已知点A(1,-1)及圆x2+y2-4x+4y+4=0,则过点A,且在圆上截得的弦为最长的弦所在的直线方程是
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A.x-1=0
B.x+y=0
C.y+1=0
D.x-y-2=0
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已知点A(1,-1)及圆x2+y2-4x+4y+4=0,则过点A,且在圆上截得的弦为最长的弦所在的直线方程是
A.x-1=0
B.x+y=0
C.y+1=0
D.x-y-2=0