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设集合A={x|y=},B={y|y=lgx,1≤x≤100},则A∩B=( )...
设集合A={x|y=
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},B={y|y=lgx,1≤x≤100},则A∩B=( )
A.[1,100]
B.[1,2]
C.[0,2]
D.[0,10)
考点分析:
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.
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(2)设g(x)=x
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设
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101025717422465/SYS201311031010257174224020_ST/0.png)
,其中c
,c
1,c
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k为非零常数,数列{a
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已知
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101025717422465/SYS201311031010257174224019_ST/1.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101025717422465/SYS201311031010257174224019_ST/2.png)
的夹角为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101025717422465/SYS201311031010257174224019_ST/3.png)
,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101025717422465/SYS201311031010257174224019_ST/4.png)
•
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101025717422465/SYS201311031010257174224019_ST/5.png)
=-1.
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101025717422465/SYS201311031010257174224019_ST/6.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101025717422465/SYS201311031010257174224019_ST/8.png)
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2![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101025717422465/SYS201311031010257174224019_ST/11.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101025717422465/SYS201311031010257174224019_ST/12.png)
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在△ABC中,内角A,B,C对边的边长分别是a,b,c,已知c=2,
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