已知抛物线Y=ax^2+bx+c与Y轴交于点A(0,3),与X轴分别交于B(1,0),C(5,0)两点(1)求此抛物线的表达式(2)若D为线段OA的中点M出发.先到达X轴上的某点(设为点E),再到达抛物线的对称轴上某
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![已知抛物线Y=ax^2+bx+c与Y轴交于点A(0,3),与X轴分别交于B(1,0),C(5,0)两点(1)求此抛物线的表达式(2)若D为线段OA的中点M出发.先到达X轴上的某点(设为点E),再到达抛物线的对称轴上某](/uploads/image/z/13303996-52-6.jpg?t=%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFY%3Dax%5E2%2Bbx%2Bc%E4%B8%8EY%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9A%EF%BC%880%2C3%EF%BC%89%2C%E4%B8%8EX%E8%BD%B4%E5%88%86%E5%88%AB%E4%BA%A4%E4%BA%8EB%EF%BC%881%2C0%EF%BC%89%2CC%EF%BC%885%2C0%EF%BC%89%E4%B8%A4%E7%82%B9%EF%BC%881%EF%BC%89%E6%B1%82%E6%AD%A4%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E8%A1%A8%E8%BE%BE%E5%BC%8F%EF%BC%882%EF%BC%89%E8%8B%A5D%E4%B8%BA%E7%BA%BF%E6%AE%B5OA%E7%9A%84%E4%B8%AD%E7%82%B9M%E5%87%BA%E5%8F%91.%E5%85%88%E5%88%B0%E8%BE%BEX%E8%BD%B4%E4%B8%8A%E7%9A%84%E6%9F%90%E7%82%B9%EF%BC%88%E8%AE%BE%E4%B8%BA%E7%82%B9E%EF%BC%89%2C%E5%86%8D%E5%88%B0%E8%BE%BE%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E5%AF%B9%E7%A7%B0%E8%BD%B4%E4%B8%8A%E6%9F%90)
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