抛物线y=ax2+bx+c交x轴于点A(-1,0)B(3,0),交y轴于点C顶点为D以BD为直径的圆M恰好过点C(1)求点C及顶点D的坐标(用字母a的代数式表示)(2)求抛物线的解析式(3)抛物线是否存在点P使ΔPBD为直
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![抛物线y=ax2+bx+c交x轴于点A(-1,0)B(3,0),交y轴于点C顶点为D以BD为直径的圆M恰好过点C(1)求点C及顶点D的坐标(用字母a的代数式表示)(2)求抛物线的解析式(3)抛物线是否存在点P使ΔPBD为直](/uploads/image/z/3814432-16-2.jpg?t=%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax2%2Bbx%2Bc%E4%BA%A4x%E8%BD%B4%E4%BA%8E%E7%82%B9A%28-1%2C0%29B%283%2C0%29%2C%E4%BA%A4y%E8%BD%B4%E4%BA%8E%E7%82%B9C%E9%A1%B6%E7%82%B9%E4%B8%BAD%E4%BB%A5BD%E4%B8%BA%E7%9B%B4%E5%BE%84%E7%9A%84%E5%9C%86M%E6%81%B0%E5%A5%BD%E8%BF%87%E7%82%B9C%EF%BC%881%EF%BC%89%E6%B1%82%E7%82%B9C%E5%8F%8A%E9%A1%B6%E7%82%B9D%E7%9A%84%E5%9D%90%E6%A0%87%EF%BC%88%E7%94%A8%E5%AD%97%E6%AF%8Da%E7%9A%84%E4%BB%A3%E6%95%B0%E5%BC%8F%E8%A1%A8%E7%A4%BA%EF%BC%89%EF%BC%882%EF%BC%89%E6%B1%82%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%EF%BC%883%EF%BC%89%E6%8A%9B%E7%89%A9%E7%BA%BF%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E7%82%B9P%E4%BD%BF%CE%94PBD%E4%B8%BA%E7%9B%B4)
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