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过点A(0,a)作直线交圆M:(x-2)2+y2=1于点B、C, (理)在BC上取一点P,使P点满足:, (文)在线段BC取一点P,使点B、P、C的横坐标的倒数成等差数列 (1)求点P的轨迹方程; (...

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