新疆
解析圓的一般方程：(2x-1)^2+(2y-1)^2=1.
圓方程直角坐標系示意圖：(2x-1)^2+(2y-1)^2=1.
解析圓絕對值的方程：(2|x|-1)^2+(2|y|-1)^2=1.
圓絕對值方程示意圖：(2|x|-1)^2+(2|y|-1)^2=1.
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