已知圆C:(x-1)²+(y-2)²=25,L:(2m+1)x+(m+1)y-7m-4=0求m取何实数L恒与圆都交两点求L截圆得弦长最正确答案: (1)恒过点(3,1) (2)点(3,1)在圆C的内部 (3)2x-y-5=0西西~~过程过程!谢谢~~~
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 02:58:21
![已知圆C:(x-1)²+(y-2)²=25,L:(2m+1)x+(m+1)y-7m-4=0求m取何实数L恒与圆都交两点求L截圆得弦长最正确答案: (1)恒过点(3,1) (2)点(3,1)在圆C的内部 (3)2x-y-5=0西西~~过程过程!谢谢~~~](/uploads/image/z/1587221-53-1.jpg?t=%E5%B7%B2%E7%9F%A5%E5%9C%86C%3A%28x-1%29%26sup2%3B%2B%28y-2%29%26sup2%3B%3D25%2CL%3A%282m%2B1%29x%2B%28m%2B1%29y-7m-4%3D0%E6%B1%82m%E5%8F%96%E4%BD%95%E5%AE%9E%E6%95%B0L%E6%81%92%E4%B8%8E%E5%9C%86%E9%83%BD%E4%BA%A4%E4%B8%A4%E7%82%B9%E6%B1%82L%E6%88%AA%E5%9C%86%E5%BE%97%E5%BC%A6%E9%95%BF%E6%9C%80%E6%AD%A3%E7%A1%AE%E7%AD%94%E6%A1%88%3A+%281%29%E6%81%92%E8%BF%87%E7%82%B9%283%2C1%29+%282%29%E7%82%B9%283%2C1%29%E5%9C%A8%E5%9C%86C%E7%9A%84%E5%86%85%E9%83%A8+%283%292x-y-5%3D0%E8%A5%BF%E8%A5%BF%EF%BD%9E%EF%BD%9E%E8%BF%87%E7%A8%8B%E8%BF%87%E7%A8%8B%21%E8%B0%A2%E8%B0%A2%EF%BD%9E%EF%BD%9E%EF%BD%9E)
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