16.已知圆C的方程为x2+y2=r2,定点M(x0,y0),直线l:x0x+y0y=r2有如下两组断论:第Ⅰ组 第Ⅱ组 (a)点M在圆C内且M不为圆心 (1)直线l与圆C相切 (b)点M在圆C上 (2)直线l与圆C相交 (c)点M在圆C
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![16.已知圆C的方程为x2+y2=r2,定点M(x0,y0),直线l:x0x+y0y=r2有如下两组断论:第Ⅰ组 第Ⅱ组 (a)点M在圆C内且M不为圆心 (1)直线l与圆C相切 (b)点M在圆C上 (2)直线l与圆C相交 (c)点M在圆C](/uploads/image/z/10756680-24-0.jpg?t=16.%E5%B7%B2%E7%9F%A5%E5%9C%86C%E7%9A%84%E6%96%B9%E7%A8%8B%E4%B8%BAx2%2By2%3Dr2%2C%E5%AE%9A%E7%82%B9M%EF%BC%88x0%2Cy0%EF%BC%89%2C%E7%9B%B4%E7%BA%BFl%3Ax0x%2By0y%3Dr2%E6%9C%89%E5%A6%82%E4%B8%8B%E4%B8%A4%E7%BB%84%E6%96%AD%E8%AE%BA%EF%BC%9A%E7%AC%AC%E2%85%A0%E7%BB%84+%E7%AC%AC%E2%85%A1%E7%BB%84+%EF%BC%88a%EF%BC%89%E7%82%B9M%E5%9C%A8%E5%9C%86C%E5%86%85%E4%B8%94M%E4%B8%8D%E4%B8%BA%E5%9C%86%E5%BF%83+%EF%BC%881%EF%BC%89%E7%9B%B4%E7%BA%BFl%E4%B8%8E%E5%9C%86C%E7%9B%B8%E5%88%87+%EF%BC%88b%EF%BC%89%E7%82%B9M%E5%9C%A8%E5%9C%86C%E4%B8%8A+%EF%BC%882%EF%BC%89%E7%9B%B4%E7%BA%BFl%E4%B8%8E%E5%9C%86C%E7%9B%B8%E4%BA%A4+%EF%BC%88c%EF%BC%89%E7%82%B9M%E5%9C%A8%E5%9C%86C)
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