27.(14分)如图,已知抛物线y=ax2+b+c(8≠0)的顶点坐标为Q(2,-1),且与),轴交于点c(0,3),与省轴交于Ahttp://www.365jy.net/home/shiti/UploadFiles_1001/2010-6/%D7%F1%D2%E5%CA%D02010%C4%EA%B3%F5%D6%D0%B1%CF%D2%B5%C9%FA%D1%A7%CD%B3%D2%B
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![27.(14分)如图,已知抛物线y=ax2+b+c(8≠0)的顶点坐标为Q(2,-1),且与),轴交于点c(0,3),与省轴交于Ahttp://www.365jy.net/home/shiti/UploadFiles_1001/2010-6/%D7%F1%D2%E5%CA%D02010%C4%EA%B3%F5%D6%D0%B1%CF%D2%B5%C9%FA%D1%A7%CD%B3%D2%B](/uploads/image/z/13303635-51-5.jpg?t=27%EF%BC%8E%2814%E5%88%86%29%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax2%2Bb%2Bc%288%E2%89%A00%29%E7%9A%84%E9%A1%B6%E7%82%B9%E5%9D%90%E6%A0%87%E4%B8%BAQ%282%2C-1%29%2C%E4%B8%94%E4%B8%8E%29%2C%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9c%280%2C3%29%2C%E4%B8%8E%E7%9C%81%E8%BD%B4%E4%BA%A4%E4%BA%8EAhttp%3A%2F%2Fwww.365jy.net%2Fhome%2Fshiti%2FUploadFiles_1001%2F2010-6%2F%25D7%25F1%25D2%25E5%25CA%25D02010%25C4%25EA%25B3%25F5%25D6%25D0%25B1%25CF%25D2%25B5%25C9%25FA%25D1%25A7%25CD%25B3%25D2%25B)
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