初三一道二次函数题如图,已知△OAB的顶点A(3,0)B(0,1)O是坐标原点,将△OAB饶点O按逆时针旋转90°,得到△ODC(1)写出C,D两点的坐标(2)求过C,D,A三点的抛物线的解析式,并求此抛物线的定点M的坐
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![初三一道二次函数题如图,已知△OAB的顶点A(3,0)B(0,1)O是坐标原点,将△OAB饶点O按逆时针旋转90°,得到△ODC(1)写出C,D两点的坐标(2)求过C,D,A三点的抛物线的解析式,并求此抛物线的定点M的坐](/uploads/image/z/2698124-68-4.jpg?t=%E5%88%9D%E4%B8%89%E4%B8%80%E9%81%93%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E9%A2%98%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5%E2%96%B3OAB%E7%9A%84%E9%A1%B6%E7%82%B9A%283%2C0%29B%280%2C1%29O%E6%98%AF%E5%9D%90%E6%A0%87%E5%8E%9F%E7%82%B9%2C%E5%B0%86%E2%96%B3OAB%E9%A5%B6%E7%82%B9O%E6%8C%89%E9%80%86%E6%97%B6%E9%92%88%E6%97%8B%E8%BD%AC90%C2%B0%2C%E5%BE%97%E5%88%B0%E2%96%B3ODC%EF%BC%881%EF%BC%89%E5%86%99%E5%87%BAC%2CD%E4%B8%A4%E7%82%B9%E7%9A%84%E5%9D%90%E6%A0%87%EF%BC%882%EF%BC%89%E6%B1%82%E8%BF%87C%2CD%2CA%E4%B8%89%E7%82%B9%E7%9A%84%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%2C%E5%B9%B6%E6%B1%82%E6%AD%A4%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E5%AE%9A%E7%82%B9M%E7%9A%84%E5%9D%90)
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