已Rt△ABO的直角顶点O为原点,OA所在的直线为x轴,OB所在的直线为y轴如图,以Rt△ABO的直角顶点O为原点,OA所在的直线为x轴,OB所在的直线为y轴,建立平面直角坐标系.已知OA=4,OB=3,一动点P从O出发沿O
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