求经过直线l:2x+y+4=0与圆C:x²+y²+2x-4y+1=0的交点,且分别满足下列条件的圆的方程(1)面积最小(2)经过点(2,-1)
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![求经过直线l:2x+y+4=0与圆C:x²+y²+2x-4y+1=0的交点,且分别满足下列条件的圆的方程(1)面积最小(2)经过点(2,-1)](/uploads/image/z/991361-65-1.jpg?t=%E6%B1%82%E7%BB%8F%E8%BF%87%E7%9B%B4%E7%BA%BFl%EF%BC%9A2x%2By%2B4%3D0%E4%B8%8E%E5%9C%86C%EF%BC%9Ax%26%23178%3B%2By%26%23178%3B%2B2x-4y%2B1%3D0%E7%9A%84%E4%BA%A4%E7%82%B9%2C%E4%B8%94%E5%88%86%E5%88%AB%E6%BB%A1%E8%B6%B3%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%E9%9D%A2%E7%A7%AF%E6%9C%80%E5%B0%8F%EF%BC%882%EF%BC%89%E7%BB%8F%E8%BF%87%E7%82%B9%EF%BC%882%2C-1%EF%BC%89)
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