满分5 >
高中数学试题 >
已知函数时,则f(f(f(a)))的值为( ) A. B. C.-2 D.2
已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182632968899424/SYS201310241826329688994003_ST/0.png)
时,则f(f(f(a)))的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182632968899424/SYS201310241826329688994003_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182632968899424/SYS201310241826329688994003_ST/2.png)
C.-2
D.2
考点分析:
相关试题推荐
有一种波,其波形为函数y=sin(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182632968899424/SYS201310241826329688994002_ST/0.png)
x)的图象,若在区间[0,t]上至少有2个波峰(图象的最高点),则正整数t的最小值是( )
A.3
B.4
C.5
D.6
查看答案
(中数量积)已知平面向量a=(x
1,y
1),b=(x
2,y
2),若|a|=2,|b|=3,a•b=-6,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182632968899424/SYS201310241826329688994001_ST/0.png)
的值为( )
A.-2
B.2
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182632968899424/SYS201310241826329688994001_ST/1.png)
D.
查看答案
已知集合U=R,A={x|0≤x≤2},B={y|y=x+1,x∈A},则A∩C
UB=( )
A.[0,2]
B.[1,3]
C.(1,3]
D.[0,1)
查看答案
已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182632968897440/SYS201310241826329688974019_ST/0.png)
,当x=1时,y=f(x)取得极值.
(1)求实数a的值;
(2)若y=f(x)-m有两个零点,求实数m的取值范围.
查看答案
已知各项均为正数的数列{a
n}的前n项和为S
n,数列{a
n2}的前n项和为T
n,满足a
1=1,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182632968897440/SYS201310241826329688974018_ST/0.png)
,其中p为常数.
(1)求p的值及数列{a
n}的通项公式;
(2)①是否存在正整数n,m,k(n<m<k),使得a
n,a
m,a
k成等差数列?若存在,指出n,m,k的关系;若不存在,请说明理由;
②若对于任意的正整数n,都有a
n,2
xa
n+1,2
ya
n+2成等差数列,求出实数x,y的值.
查看答案