满分5 >
高中数学试题 >
已知函数f(x)是定义在R上的奇函数,当x>0时,f(x)=2x,则f(-2)=...
已知函数f(x)是定义在R上的奇函数,当x>0时,f(x)=2
x,则f(-2)=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743827497/SYS201311031027297438274005_ST/0.png)
B.-4
C.-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743827497/SYS201311031027297438274005_ST/1.png)
D.4
考点分析:
相关试题推荐
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743827497/SYS201311031027297438274004_ST/images0.png)
函数f(x)=a
x-b的图象如图,其中a、b为常数,则下列结论正确的是( )
A.a>1,b<0
B.a>1,b>0
C.0<a<1,b>0
D.0<a<1,b<0
查看答案
若函数f(x)=log
ax(0<a<1)在区间[a,2a]上的最大值是最小值的3倍,则a等于( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743827497/SYS201311031027297438274003_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743827497/SYS201311031027297438274003_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743827497/SYS201311031027297438274003_ST/2.png)
D.
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743827497/SYS201311031027297438274000_ST/images0.png)
设全集U={1,2,3,4,5,6,7,8},集合A={1,2,3,5},B={2,4,6},则图中的阴影部分表示的集合为( )
A.{2}
B.{4,6}
C.{1,3,5}
D.{4,6,7,8}
查看答案