如图,点C为圆O:x^2+y^2=1上一点,以C为圆心做一圆与X轴相切于点D,与圆O交于点EF求直线EF的方程求证EF平分CD
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![如图,点C为圆O:x^2+y^2=1上一点,以C为圆心做一圆与X轴相切于点D,与圆O交于点EF求直线EF的方程求证EF平分CD](/uploads/image/z/10006433-17-3.jpg?t=%E5%A6%82%E5%9B%BE%2C%E7%82%B9C%E4%B8%BA%E5%9C%86O%3Ax%5E2%2By%5E2%3D1%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E4%BB%A5C%E4%B8%BA%E5%9C%86%E5%BF%83%E5%81%9A%E4%B8%80%E5%9C%86%E4%B8%8EX%E8%BD%B4%E7%9B%B8%E5%88%87%E4%BA%8E%E7%82%B9D%2C%E4%B8%8E%E5%9C%86O%E4%BA%A4%E4%BA%8E%E7%82%B9EF%E6%B1%82%E7%9B%B4%E7%BA%BFEF%E7%9A%84%E6%96%B9%E7%A8%8B%E6%B1%82%E8%AF%81EF%E5%B9%B3%E5%88%86CD)
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