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一圆与圆C:\({\left( {x + 2} \right)^2} + {\left( {y + 1} \right)^2} = 4\)为同心圆且面积为圆C面积的两倍,此圆的标准方程为___.
参考答案:\({\left( {x + 2} \right)^2} + {\left( {y + 1} \right)^2} = 8\)
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