满分5 >
高中数学试题 >
已知直线3x+(a+1)y+3=0与ax+2y+2=0互相平行,则实数a的值等于...
已知直线3x+(a+1)y+3=0与ax+2y+2=0互相平行,则实数a的值等于 .
考点分析:
相关试题推荐
设
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101936722059088/SYS201311031019367220590002_ST/0.png)
=(2,-3),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101936722059088/SYS201311031019367220590002_ST/1.png)
=(-1,1),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101936722059088/SYS201311031019367220590002_ST/2.png)
是与
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101936722059088/SYS201311031019367220590002_ST/3.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101936722059088/SYS201311031019367220590002_ST/4.png)
同向的单位向量,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101936722059088/SYS201311031019367220590002_ST/5.png)
的坐标是
.
查看答案
已知一个关于x,y的二元线性方程组的增广矩阵是
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101936722059088/SYS201311031019367220590001_ST/0.png)
,则x+y=
.
查看答案
过点M(-2,3),且垂直于x轴的直线方程为
.
查看答案
已知点P是圆x
2+y
2=1上任意一点,过点P作y轴的垂线,垂足为Q,点R满足
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101936721786986/SYS201311031019367217869021_ST/0.png)
,记点R的轨迹为曲线C.
(Ⅰ)求曲线C的方程;
(Ⅱ)设A(0,1),点M、N在曲线C上,且直线AM与直线AN的斜率之积为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101936721786986/SYS201311031019367217869021_ST/1.png)
,求△AMN的面积的最大值.
查看答案
已知:以点
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101936721786986/SYS201311031019367217869020_ST/0.png)
为圆心的圆与x轴交于点O,A,与y轴交于点O、B,其中O为原点,
(1)求证:△OAB的面积为定值;
(2)设直线y=-2x+4与圆C交于点M,N,若OM=ON,求圆C的方程.
查看答案