满分5 >
高中数学试题 >
已知圆锥的底面半径为R,高为3R,在它的所有内接圆柱中,全面积的最大值是( ) ...
已知圆锥的底面半径为R,高为3R,在它的所有内接圆柱中,全面积的最大值是( )
A.2πR
2B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901007_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901007_ST/1.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901007_ST/2.png)
考点分析:
相关试题推荐
如果直线l
1:y=ax+2与直线l
2:y=3x+lgb关于直线y=x对称,那么( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901006_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901006_ST/1.png)
C.a=3,b=10
-2D.a=3,b=10
2
查看答案
实数x,y满足
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901005_ST/0.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901005_ST/1.png)
的最大值是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901005_ST/2.png)
B.7
C.5
D.8
查看答案
若奇函数y=f(x)(x≠0),当x∈(0,+∞)时,f(x)=x-1,则不等式f(x)<0的解集是( )
A.{x|x<-1或0<x<1}
B.{x|-1<x<0}
C.{x|0<x<1}
D.{x|x<-1或x>1}
查看答案
已知直线m,n,平面α,β,给出下列命题中正确的是( )
(1)若m⊥α,m⊥β,则α⊥β;
(2)若m∥α,m∥β,则α∥β;
(3)若m⊥α,m∥β,则α⊥β;
(4)若异面直线m,n互相垂直,则存在过m的平面与n垂直.
A.(2)(3)
B.(1)(3)
C.(2)(4)
D.(3)(4)
查看答案
设函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901002_ST/0.png)
(其中0<ω<2),若函数f(x)图象的一条对称轴为x=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901002_ST/1.png)
,那么ω=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901002_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901002_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224709129390187/SYS201311012247091293901002_ST/4.png)
D.
查看答案