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解析几何之平移齐次
已知椭圆 C:\frac{x^2}{4}+\frac{y^2}{3}=1 ,若直线 l:y=kx+m 与椭圆 C 相交于 A, B 两点(A,B 不是左右顶点),且以 AB 为直径的圆过 ( 0,0 ) . 求证:直线 l 与定圆相切. 分析 由题意,画出图像可知 OA…
数学
56
3 min
2 years ago
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