考点分析:
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已知直线x-y+a=0与圆x
2+y
2=1交于不同两点A、B,O为坐标原点,则“a=1”是“向量
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、
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满足
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”的( )
A.充分不必要条件
B.必要不充分条件
C.充要条件
D.既不充分也不必要条件
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设点M(a,b)是曲线
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上的任意一点,直线l是曲线C在点M处的切线,那么直线l斜率的最小值为( )
A.-2
B.0
C.2
D.4
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已知函数f(x)=a
x+log
ax(a>0且a≠1)在[1,2]上的最大值与最小值之和为(log
a2)+6,则a的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183708304774774/SYS201310241837083047747008_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183708304774774/SYS201310241837083047747008_ST/1.png)
C.2
D.4
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已知函数f(x)=log
a(x+b)的大致图象如图,其中a,b为常数,则函数g(x)=a
x+b的大致图象是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183708304774774/SYS201310241837083047747007_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183708304774774/SYS201310241837083047747007_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183708304774774/SYS201310241837083047747007_ST/images3.png)
D.
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183708304774774/SYS201310241837083047747006_ST/images0.png)
一个算法的程序框图如图所示,该程序输出的结果为( )
A.
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B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183708304774774/SYS201310241837083047747006_ST/1.png)
C.
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D.
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