满分5 >
高中数学试题 >
f(x)是定义在实数有R上的奇函数,若x≥0时,f(x)=log3(1+x),则...
f(x)是定义在实数有R上的奇函数,若x≥0时,f(x)=log3(1+x),则f(-2)= .
考点分析:
相关试题推荐
双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904009_ST/0.png)
=1(a>0,b>0)的右支上存在一点,它到右焦点及左准线的距离相等,则双曲线离心率的取值范围是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904009_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904009_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904009_ST/3.png)
D.
查看答案
甲,乙,丙,丁,戊5人站成一排,要求甲,乙均不与丙相邻,不同的排法种数有( )
A.72种
B.54种
C.36种
D.24种
查看答案
已知等差数列{a
n}的前n项和为S
n,若S
2=10,S
5=55,则过点P(n,a
n)和Q(n+2,a
n+2)(n∈N
*)的直线的斜率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904007_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904007_ST/1.png)
C.4
D.2
查看答案
设变量x,y满足约束条件:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904006_ST/0.png)
,则z=x-3y的最小值( )
A.-2
B.-4
C.-6
D.-8
查看答案
设向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904005_ST/0.png)
与
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904005_ST/1.png)
的夹角为θ且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904005_ST/2.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904005_ST/3.png)
,则cosθ=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904005_ST/4.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904005_ST/5.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183623856390485/SYS201310241836238563904005_ST/6.png)
D.
查看答案