满分5 >
高中数学试题 >
将圆x2+y2-2x-4y+1=0平分的直线是( ) A.x+y-1=0 B.x...
将圆x2+y2-2x-4y+1=0平分的直线是( )
A.x+y-1=0
B.x+y+3=0
C.x-y+1=0
D.x-y+3=0
考点分析:
相关试题推荐
在△ABC中,已知A=120°,b=1,c=2,则a=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727012_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727012_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727012_ST/2.png)
D.
查看答案
如果直线ax+2y+1=0与直线x+y-2=0互相垂直,那么a的值等于( )
A.1
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727011_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727011_ST/1.png)
D.-2
查看答案
已知等差数列{a
n}中,a
7+a
8=16,a
4=1,则a
11=( )
A.15
B.30
C.31
D.64
查看答案
将函数y=sin2x的图象向左平移
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727009_ST/0.png)
个单位,得到函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727009_ST/1.png)
的图象,则ϕ的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727009_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727009_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727009_ST/4.png)
D.
查看答案
对某商店一个月内每天的顾客人数进行了统计,得到样本的茎叶图,则该样本的中位数、众数分别是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727008_ST/images0.png)
A.45,56
B.46,45
C.47,45
D.45,47
查看答案