已知如图,抛物线y=ax2+bx+c过点B(3.0)且经过直线y=-3x-3与坐标轴的两个交点A,C一,求抛物线的解析式二,若D点是在y轴的右侧的抛物线上的一动点,过点D作直线AC的垂线,垂足为E,是否存在D点,使得C,D,E
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![已知如图,抛物线y=ax2+bx+c过点B(3.0)且经过直线y=-3x-3与坐标轴的两个交点A,C一,求抛物线的解析式二,若D点是在y轴的右侧的抛物线上的一动点,过点D作直线AC的垂线,垂足为E,是否存在D点,使得C,D,E](/uploads/image/z/7651561-49-1.jpg?t=%E5%B7%B2%E7%9F%A5%E5%A6%82%E5%9B%BE%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax2%2Bbx%2Bc%E8%BF%87%E7%82%B9B%283.0%29%E4%B8%94%E7%BB%8F%E8%BF%87%E7%9B%B4%E7%BA%BFy%3D-3x-3%E4%B8%8E%E5%9D%90%E6%A0%87%E8%BD%B4%E7%9A%84%E4%B8%A4%E4%B8%AA%E4%BA%A4%E7%82%B9A%2CC%E4%B8%80%2C%E6%B1%82%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%E4%BA%8C%2C%E8%8B%A5D%E7%82%B9%E6%98%AF%E5%9C%A8y%E8%BD%B4%E7%9A%84%E5%8F%B3%E4%BE%A7%E7%9A%84%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8A%E7%9A%84%E4%B8%80%E5%8A%A8%E7%82%B9%2C%E8%BF%87%E7%82%B9D%E4%BD%9C%E7%9B%B4%E7%BA%BFAC%E7%9A%84%E5%9E%82%E7%BA%BF%2C%E5%9E%82%E8%B6%B3%E4%B8%BAE%2C%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8D%E7%82%B9%2C%E4%BD%BF%E5%BE%97C%2CD%2CE)
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