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设定义域为R的函数f(x),g(x)都有反函数,且函数f(x-1)和g-1(x-...
设定义域为R的函数f(x),g(x)都有反函数,且函数f(x-1)和g-1(x-3)图象关于直线y=x对称,若g(5)=2005,则f(4)为( )
A.2002
B.2004
C.2007
D.2008
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已知函数f(x)=2cos
2x+2sinxcosx-1的图象与g(x)=-1的图象在y轴的右侧交点按从横坐标由小到大的顺序记为D
1,D
2,D
3,…,则|D
5D
7|=( )
A.
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B.π
C.2π
D.
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直线2(m+1)x+(m-3)y+7-5m=0与直线(m-3)x+2y-5=0垂直的充要条件是( )
A.m=-2
B.m=3
C.m=-1或m=3
D.m=3或m=-2
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若
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=(2,3),
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=(-4,7),则
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在
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方向上的投影为( )
A.
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B.
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C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183325082913775/SYS201310241833250829137008_ST/6.png)
D.
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设
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,O为坐标原点,若A、B、C三点共线,则
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的最小值是( )
A.2
B.4
C.6
D.8
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若
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,则cosα+sinα的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183325082913775/SYS201310241833250829137006_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183325082913775/SYS201310241833250829137006_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183325082913775/SYS201310241833250829137006_ST/3.png)
D.
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