满分5 >
高中数学试题 >
已知集合A={0,a},B={b|b2-3b<0,b∈Z},A∩B≠∅,则实数a...
已知集合A={0,a},B={b|b2-3b<0,b∈Z},A∩B≠∅,则实数a的值为( )
A.1
B.2
C.1或2
D.2或3
考点分析:
相关试题推荐
复数i
3-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420359074407/SYS201311012244203590744000_ST/0.png)
的值是( )
A.0
B.1
C.-1
D.i
查看答案
已知各项均为正数的数列{a
n}满足:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822020_ST/0.png)
(I)求a
1,a
2,a
3的值,猜测a
n的表达式并给予证明;
(II)求证:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822020_ST/1.png)
;
(III)设数列
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822020_ST/2.png)
的前n项和为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822020_ST/3.png)
.
查看答案
已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822019_ST/0.png)
的图象上移动时,点
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822019_ST/1.png)
的图象上移动.
(I)点P的坐标为(1,-1),点Q也在y=f(x)的图象上,求t的值;
(Ⅱ)求函数y=g(x)的解析式;
(Ⅲ)若方程
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822019_ST/2.png)
的解集是∅,求实数t的取值范围.
查看答案
已知函数f(x)=(sinx+cosx)
2-2sin
2x.
(I)若将函数y=f(x)的图象向左平移a(a>0)个单位长度得到的图象恰好关于点
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822018_ST/0.png)
对称,求实数a的最小值;
(II)若函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822018_ST/1.png)
上为减函数,试求实数b的值.
查看答案
已知数列{a
n}}满足:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822017_ST/0.png)
.
(I)令
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822017_ST/1.png)
为等差数列;
(II)求
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224420358882204/SYS201311012244203588822017_ST/2.png)
.
查看答案