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程序框图表示的算法的运行结果是( ) A.5 B.6 C.7 D.8
程序框图表示的算法的运行结果是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101128005413537/SYS201311031011280054135004_ST/images0.png)
A.5
B.6
C.7
D.8
考点分析:
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若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101128005413537/SYS201311031011280054135003_ST/0.png)
是非零向量且满足(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101128005413537/SYS201311031011280054135003_ST/1.png)
)⊥
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,
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,则
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与
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的夹角是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101128005413537/SYS201311031011280054135003_ST/6.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101128005413537/SYS201311031011280054135003_ST/7.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101128005413537/SYS201311031011280054135003_ST/8.png)
D.
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A.
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B.
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C.
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D.
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A.存在一个x∈R,使得f(x)>g(x)
B.有无数多个x∈R,使得f(x)>g(x)
C.对R中任意的x,都有f(x)>g(x)+1
D.R中不存在x,使得f(x)≤g(x)
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B.6
C.12
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的椭圆过点(
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,
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).
(1)求椭圆的方程;
(2)设不过原点O的直线l与该椭圆交于P,Q两点,满足直线OP,PQ,OQ的斜率依次成等比数列,求△OPQ面积的取值范围.
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