满分5 >
高中数学试题 >
在平面直角坐标系xOy中,直线3x+4y-5=0与圆x2+y2=4相交于A、B两...
在平面直角坐标系xOy中,直线3x+4y-5=0与圆x2+y2=4相交于A、B两点,则弦AB的长等于 .
考点分析:
相关试题推荐
一个球的体积是
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727034_ST/0.png)
,那么这个球的半径是
.
查看答案
已知双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727033_ST/0.png)
的左、右焦点分别为F
1、F
2,若在双曲线的右支上存在一点P,使得|PF
1|=3|PF
2|,则双曲线的离心率e的取值范围为( )
A.[
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727033_ST/1.png)
,+∞)
B.[2,+∞)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727033_ST/2.png)
D.(1,2]
查看答案
(x
2+2)(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727032_ST/0.png)
)
5的展开式的常数项是( )
A.-3
B.-2
C.2
D.3
查看答案
一批零件次品率为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727031_ST/0.png)
,连抽4件,抽出的次品数为ξ,则D(ξ)等于( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727031_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727031_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727031_ST/3.png)
D.
查看答案
已知A(1,2,-1)关于面xoy的对称点为B,而B关于x轴对称的点为C,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727030_ST/0.png)
=( )
A.(0,4,2)
B.(0,-4,-2)
C.(0,4,0)
D.(2,0,-2)
查看答案