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已知圆的方程为x2+y2-6x-8y=0,设该圆过点(3,5)的最长弦和最短弦分...
已知圆的方程为x
2+y
2-6x-8y=0,设该圆过点(3,5)的最长弦和最短弦分别为AC和BD,则四边形ABCD的面积为( )
A.10
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123815749962646/SYS201310251238157499626005_ST/0.png)
B.20
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123815749962646/SYS201310251238157499626005_ST/1.png)
C.30
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123815749962646/SYS201310251238157499626005_ST/2.png)
D.40
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123815749962646/SYS201310251238157499626005_ST/3.png)
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D.
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方程|x|-1=
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A.一个圆
B.两个圆
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D.两个半圆
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的圆的方程为( )
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B.x
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2+2x+4y=0
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2+2x-4y=0
D.x
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经过圆x
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两条直线y=x+2a,y=2x+a的交点P在圆(x-1)
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<a<1
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