由对称性,只用算第一象限的45度角之下,得:
x^2 + y^2 = (1-x)^2
用极坐标大概可以积分求得临界曲线内部面积
由对称性,只用算第一象限的45度角之下,得:
x^2 + y^2 = (1-x)^2
用极坐标大概可以积分求得临界曲线内部面积
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