动点M在圆 (x-4)2+y2=16上移动,求M与定点A(-4,8)连线的中点P的轨迹方程为
A. (x-3)2+ (y-3)2 =4 | B. x2+ (y-3)2 ="4" |
C. x2+ (y-4)2 =4 | D.x2+ (y+4)2 ="4" |
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动点M在圆 (x-4)2+y2=16上移动,求M与定点A(-4,8)连线的中点P的轨迹方程为
A. (x-3)2+ (y-3)2 =4 | B. x2+ (y-3)2 ="4" |
C. x2+ (y-4)2 =4 | D.x2+ (y+4)2 ="4" |