为什么两个圆的方程联立出来是个直线方程,而不像两个直线方程联立出来个是个具体的点? 知乎 Template




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tomski为什么两个圆的方程联立出来是个直线方程,而不像两个直线方程联立出来个是个具体的点? 知乎 coloring