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设不等式组表示的平面区域为D,在区域D内随机取一点,则此点到坐标原点的距离大于1...
设不等式组
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表示的平面区域为D,在区域D内随机取一点,则此点到坐标原点的距离大于1的概率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123733327776787/SYS201310251237333277767006_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123733327776787/SYS201310251237333277767006_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123733327776787/SYS201310251237333277767006_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123733327776787/SYS201310251237333277767006_ST/4.png)
考点分析:
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执行程序框图,如果输入a=4,那么输出的n的值为( )
A.2
B.3
C.4
D.5
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已知{a
n}为等比数列,下列结论正确的是( )
A.a
3+a
5≥2a
4B.
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C.若a
3=a
5,则a
3=a
4D.若a
3>a
1,则a
4>a
2
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