满分5 >
高中数学试题 >
直线ax+2y+6=0与直线x+(a-1)y+(a2-1)=0平行,则a等于( ...
直线ax+2y+6=0与直线x+(a-1)y+(a
2-1)=0平行,则a等于( )
A.-1或2
B.2
C.-1
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192009_ST/0.png)
考点分析:
相关试题推荐
圆心在y轴上,半径为1,且过点(1,2)的圆的方程为( )
A.x
2+(y-2)
2=1
B.x
2+(y+2)
2=1
C.(x-1)
2+(y-3)
2=1
D.x
2+(y-3)
2=1
查看答案
设某几何体的三视图如下(尺寸的长度单位为m).则该几何体的体积为( )m
3.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192007_ST/images0.png)
A.3
B.4
C.5
D.6
查看答案
三棱锥P-ABC中,PA,PB,PC两两互相垂直,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192006_ST/0.png)
,则点P到平面ABC的距离为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192006_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192006_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192006_ST/3.png)
D.1
查看答案
用与球心距离为1的平面去截球,所得的截面面积为π,则球的体积为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192005_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192005_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192005_ST/2.png)
D.
查看答案
函数f(x)=ln(4+3x-x
2)的单调递减区间是( )
A.[
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192004_ST/0.png)
,4)
B.[
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192004_ST/1.png)
,+∞)
C.(-1,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192004_ST/2.png)
]
D.(-∞,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230437914119252/SYS201311012304379141192004_ST/3.png)
]
查看答案