.1.二次函数y=x^2+ax+b与两坐标轴有三个不同的交点,经过这三点的圆记为C,求证:圆C恒过定点,并求出定点坐标.2.A为单位圆上定点,B是A关于x轴的对称点,P为圆上动点,直线AP和BP分别交x轴于点M和N,
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![.1.二次函数y=x^2+ax+b与两坐标轴有三个不同的交点,经过这三点的圆记为C,求证:圆C恒过定点,并求出定点坐标.2.A为单位圆上定点,B是A关于x轴的对称点,P为圆上动点,直线AP和BP分别交x轴于点M和N,](/uploads/image/z/13787544-48-4.jpg?t=.1.%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3Dx%5E2%2Bax%2Bb%E4%B8%8E%E4%B8%A4%E5%9D%90%E6%A0%87%E8%BD%B4%E6%9C%89%E4%B8%89%E4%B8%AA%E4%B8%8D%E5%90%8C%E7%9A%84%E4%BA%A4%E7%82%B9%2C%E7%BB%8F%E8%BF%87%E8%BF%99%E4%B8%89%E7%82%B9%E7%9A%84%E5%9C%86%E8%AE%B0%E4%B8%BAC%2C%E6%B1%82%E8%AF%81%EF%BC%9A%E5%9C%86C%E6%81%92%E8%BF%87%E5%AE%9A%E7%82%B9%2C%E5%B9%B6%E6%B1%82%E5%87%BA%E5%AE%9A%E7%82%B9%E5%9D%90%E6%A0%87.2.A%E4%B8%BA%E5%8D%95%E4%BD%8D%E5%9C%86%E4%B8%8A%E5%AE%9A%E7%82%B9%2CB%E6%98%AFA%E5%85%B3%E4%BA%8Ex%E8%BD%B4%E7%9A%84%E5%AF%B9%E7%A7%B0%E7%82%B9%2CP%E4%B8%BA%E5%9C%86%E4%B8%8A%E5%8A%A8%E7%82%B9%2C%E7%9B%B4%E7%BA%BFAP%E5%92%8CBP%E5%88%86%E5%88%AB%E4%BA%A4x%E8%BD%B4%E4%BA%8E%E7%82%B9M%E5%92%8CN%2C)
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