抛物线y=-x^2+2(k-1)x+k+1与x轴交与AB两点,与y轴交与C点,线段OA、OB的长度之比为1:3(1) 求解析式及A、B坐标 (2) 圆D,AB直径,与y轴正半轴交与点E,EF是切线,求F坐标 (3)R是x轴上任意一点
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![抛物线y=-x^2+2(k-1)x+k+1与x轴交与AB两点,与y轴交与C点,线段OA、OB的长度之比为1:3(1) 求解析式及A、B坐标 (2) 圆D,AB直径,与y轴正半轴交与点E,EF是切线,求F坐标 (3)R是x轴上任意一点](/uploads/image/z/8341453-37-3.jpg?t=%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D-x%5E2%2B2%EF%BC%88k-1%EF%BC%89x%2Bk%2B1%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%B8%8EAB%E4%B8%A4%E7%82%B9%2C%E4%B8%8Ey%E8%BD%B4%E4%BA%A4%E4%B8%8EC%E7%82%B9%2C%E7%BA%BF%E6%AE%B5OA%E3%80%81OB%E7%9A%84%E9%95%BF%E5%BA%A6%E4%B9%8B%E6%AF%94%E4%B8%BA1%3A3%EF%BC%881%EF%BC%89+%E6%B1%82%E8%A7%A3%E6%9E%90%E5%BC%8F%E5%8F%8AA%E3%80%81B%E5%9D%90%E6%A0%87+++++%EF%BC%882%EF%BC%89+%E5%9C%86D%2CAB%E7%9B%B4%E5%BE%84%2C%E4%B8%8Ey%E8%BD%B4%E6%AD%A3%E5%8D%8A%E8%BD%B4%E4%BA%A4%E4%B8%8E%E7%82%B9E%2CEF%E6%98%AF%E5%88%87%E7%BA%BF%2C%E6%B1%82F%E5%9D%90%E6%A0%87+++++%EF%BC%883%EF%BC%89R%E6%98%AFx%E8%BD%B4%E4%B8%8A%E4%BB%BB%E6%84%8F%E4%B8%80%E7%82%B9)
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