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已知函数f(x)=sinωx+cosωx,x∈R,f(α)=-2,f(β)=2,...
已知函数f(x)=sinωx+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807008_ST/0.png)
cosωx,x∈R,f(α)=-2,f(β)=2,且|α-β|的最小值等于
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807008_ST/1.png)
,则正数ω的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807008_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807008_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807008_ST/4.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807008_ST/5.png)
考点分析:
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设l、m、n表示三条直线,α、β、r表示三个平面,则下面命题中不成立的是( )
A.若l⊥α,m⊥α,则l∥m
B.若m⊂β,n是l在β内的射影,m⊥l,则m⊥n
C.若m⊂α,n⊄α,m∥n,则n∥α
D.若α⊥r,β⊥r,则α∥β
查看答案
等比数列{a
n}的前三项和S
3=18,若a
1,3-a
2,a
3成等差数列,则公比q=( )
A.2或
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807006_ST/0.png)
B.-2或
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C.-2或
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D.2或
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已知函数f(x)=x-4+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807005_ST/0.png)
,x∈(0,4),当x=a时,f(x)取得最小值b,则在直角坐标系中函数g(x)=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807005_ST/1.png)
的图象为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807005_ST/images2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807005_ST/images3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807005_ST/images4.png)
D.
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已知向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807004_ST/0.png)
=(2,1),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807004_ST/1.png)
=10,|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807004_ST/2.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807004_ST/3.png)
|=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807004_ST/4.png)
,则|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807004_ST/5.png)
|=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807004_ST/6.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807004_ST/7.png)
C.5
D.25
查看答案
利用数学归纳法证明不等式1+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807003_ST/0.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807003_ST/1.png)
+…+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101341958680782/SYS201311031013419586807003_ST/2.png)
<f(n)(n≥2,n∈N
*)的过程中,由n=k变到n=k+1时,左边增加了( )
A.1项
B.k项
C.2
k-1项
D.2
k项
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