(2010年毕节)如图,在平面直角坐标系中,抛物线y=ax2+bx+c(a≠0)的图象与x轴交于点A(-2,0)、B(4,0),与y轴交于点C(0,4),直线l是抛物线的对称轴,与x轴交于点D,点P是直线l上一动点.(1)求此抛物线的表
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![(2010年毕节)如图,在平面直角坐标系中,抛物线y=ax2+bx+c(a≠0)的图象与x轴交于点A(-2,0)、B(4,0),与y轴交于点C(0,4),直线l是抛物线的对称轴,与x轴交于点D,点P是直线l上一动点.(1)求此抛物线的表](/uploads/image/z/2308386-66-6.jpg?t=%EF%BC%882010%E5%B9%B4%E6%AF%95%E8%8A%82%EF%BC%89%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax2%2Bbx%2Bc%28a%E2%89%A00%29%E7%9A%84%E5%9B%BE%E8%B1%A1%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9A%28-2%2C0%29%E3%80%81B%284%2C0%29%2C%E4%B8%8Ey%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9C%280%2C4%29%2C%E7%9B%B4%E7%BA%BFl%E6%98%AF%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E5%AF%B9%E7%A7%B0%E8%BD%B4%2C%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9D%2C%E7%82%B9P%E6%98%AF%E7%9B%B4%E7%BA%BFl%E4%B8%8A%E4%B8%80%E5%8A%A8%E7%82%B9%EF%BC%8E%281%29%E6%B1%82%E6%AD%A4%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E8%A1%A8)
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