已知圆的半径为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102429882678385/SYS201311031024298826783016_ST/0.png)
,圆心在直线y=2x上,圆被直线x-y=0截得的弦长为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102429882678385/SYS201311031024298826783016_ST/1.png)
,求圆的方程.
考点分析:
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