1.已知二次函数的图像过点(1,9)和(2,4)切它与x轴只有一个交点.求二次函数解析式2.抛物线y=-1/3(x-p)^2+q的顶点在抛物线y=x^2上.且抛物线在x轴上截取的线段长为4√3.求p,q的值我学二次函数
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![1.已知二次函数的图像过点(1,9)和(2,4)切它与x轴只有一个交点.求二次函数解析式2.抛物线y=-1/3(x-p)^2+q的顶点在抛物线y=x^2上.且抛物线在x轴上截取的线段长为4√3.求p,q的值我学二次函数](/uploads/image/z/6992023-31-3.jpg?t=1.%E5%B7%B2%E7%9F%A5%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E7%9A%84%E5%9B%BE%E5%83%8F%E8%BF%87%E7%82%B9%EF%BC%881%2C9%EF%BC%89%E5%92%8C%EF%BC%882%2C4%EF%BC%89%E5%88%87%E5%AE%83%E4%B8%8Ex%E8%BD%B4%E5%8F%AA%E6%9C%89%E4%B8%80%E4%B8%AA%E4%BA%A4%E7%82%B9.%E6%B1%82%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E8%A7%A3%E6%9E%90%E5%BC%8F2.%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D-1%2F3%EF%BC%88x-p%29%5E2%2Bq%E7%9A%84%E9%A1%B6%E7%82%B9%E5%9C%A8%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dx%5E2%E4%B8%8A.%E4%B8%94%E6%8A%9B%E7%89%A9%E7%BA%BF%E5%9C%A8x%E8%BD%B4%E4%B8%8A%E6%88%AA%E5%8F%96%E7%9A%84%E7%BA%BF%E6%AE%B5%E9%95%BF%E4%B8%BA4%E2%88%9A3.%E6%B1%82p%2Cq%E7%9A%84%E5%80%BC%E6%88%91%E5%AD%A6%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0)
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