满分5 >
高中数学试题 >
已知函数,则函数f(x)有两个相异零点的充要条件是( ) A. B. C. D....
已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619008_ST/0.png)
,则函数f(x)有两个相异零点的充要条件是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619008_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619008_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619008_ST/3.png)
D.-2<a<2
考点分析:
相关试题推荐
在△ABC所在的平面内有一点P,如果
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619007_ST/0.png)
,那么△PBC的面积与△ABC的面积之比是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619007_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619007_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619007_ST/3.png)
D.
查看答案
如图是某几何体的三视图,其中正视图是腰长为2的等腰三角形,侧视图是半径为1的半圆,则该几何体的体积是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619006_ST/images0.png)
A.π
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619006_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619006_ST/1.png)
D.
查看答案
已知α是第三象限的角,且tanα=2,则sin(α+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619005_ST/0.png)
)=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619005_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619005_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619005_ST/3.png)
D.
查看答案
已知等差数列1,a,b,等比数列3,a+2,b+5,则该等差数列的公差为( )
A.3或-3
B.3或-1
C.3
D.-3
查看答案
给出以下命题:①∃x∈R,sinx+cosx>1②∀x∈R,x
2-x+1>0③“x>1”是“|x|>1”的充分不必要条件,其中正确命题的个数是( )
A.0
B.1
C.2
D.3
查看答案