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已知椭圆:$\dfrac{x^2}{2}+y^2=1$,圆:$x^2+y^2=4$,从圆上一点作椭圆的切点弦,求切点弦围成的面积。 lemondian 发表于 2020-8-2 13:25
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2025-7-15 14:15 GMT+8
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