1、写出下列各圆的圆心坐标和半径(1)x2+(y-12)2=81(2)(x+8)2+y2=12上面的2除了12以外全是2次方2、求适合下列条件的圆的方程(1)圆心是(3,4),并经过原点(2)圆心在原点,并和直线4x-3
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![1、写出下列各圆的圆心坐标和半径(1)x2+(y-12)2=81(2)(x+8)2+y2=12上面的2除了12以外全是2次方2、求适合下列条件的圆的方程(1)圆心是(3,4),并经过原点(2)圆心在原点,并和直线4x-3](/uploads/image/z/11708569-1-9.jpg?t=1%E3%80%81%E5%86%99%E5%87%BA%E4%B8%8B%E5%88%97%E5%90%84%E5%9C%86%E7%9A%84%E5%9C%86%E5%BF%83%E5%9D%90%E6%A0%87%E5%92%8C%E5%8D%8A%E5%BE%84%EF%BC%881%EF%BC%89x2%2B%EF%BC%88y-12%EF%BC%892%3D81%EF%BC%882%EF%BC%89%EF%BC%88x%2B8%EF%BC%892%2By2%3D12%E4%B8%8A%E9%9D%A2%E7%9A%842%E9%99%A4%E4%BA%8612%E4%BB%A5%E5%A4%96%E5%85%A8%E6%98%AF2%E6%AC%A1%E6%96%B92%E3%80%81%E6%B1%82%E9%80%82%E5%90%88%E4%B8%8B%E5%88%97%E6%9D%A1%E4%BB%B6%E7%9A%84%E5%9C%86%E7%9A%84%E6%96%B9%E7%A8%8B%EF%BC%881%EF%BC%89%E5%9C%86%E5%BF%83%E6%98%AF%EF%BC%883%2C4%EF%BC%89%2C%E5%B9%B6%E7%BB%8F%E8%BF%87%E5%8E%9F%E7%82%B9%EF%BC%882%EF%BC%89%E5%9C%86%E5%BF%83%E5%9C%A8%E5%8E%9F%E7%82%B9%2C%E5%B9%B6%E5%92%8C%E7%9B%B4%E7%BA%BF4x-3)
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