已知圆C:x
2+y
2-8x+4y+16=0
(1)若直线l过点A(3,0),且被圆C截得的弦长为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102747346148183/SYS201311031027473461481019_ST/0.png)
,求直线l的方程;
(2)设直线l:mx-(m
2+1)y=4m,m∈R,问直线l能否将圆C分割成弧长的比值为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102747346148183/SYS201311031027473461481019_ST/1.png)
的两段圆弧?为什么?
考点分析:
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