满分5 >
高中数学试题 >
若直线与直线x-2y+5=0与直线2x+my-6=0互相垂直,则实数m= .
若直线与直线x-2y+5=0与直线2x+my-6=0互相垂直,则实数m= .
考点分析:
相关试题推荐
已知向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231654437718201/SYS201311012316544377182010_ST/0.png)
=(2,-1,3),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231654437718201/SYS201311012316544377182010_ST/1.png)
=(-4,2,x),若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231654437718201/SYS201311012316544377182010_ST/2.png)
⊥
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231654437718201/SYS201311012316544377182010_ST/3.png)
,则x=
.
查看答案
已知点F是双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231654437718201/SYS201311012316544377182009_ST/0.png)
的右焦点,点C是该双曲线的左顶点,过F且垂直于x轴的直线与双曲线交于A、B两点,若△ABC是锐角三角形,则此双曲线离心率的取值范围是( )
A.(1,2)
B.(1,+∞)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231654437718201/SYS201311012316544377182009_ST/1.png)
D.
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231654437718201/SYS201311012316544377182008_ST/images0.png)
如图,有公共左顶点和公共左焦点F的椭圆Ⅰ与Ⅱ的长半轴的长分别为a
1和a
2,半焦距分别为c
1和c
2,椭圆Ⅱ的右顶点为椭圆Ⅰ的中心,则下列结论不正确的是( )
A.a
1-c
1=a
2-c
2B.a
1+c
1>a
2+c
2C.a
1c
2>a
2c
1D.a
1c
2<a
2c
1
查看答案
已知双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231654437718201/SYS201311012316544377182007_ST/0.png)
(a>0,b>0)的两条渐近线均和圆C:x
2+y
2-6x+5=0相切,且双曲线的右焦点为圆C的圆心,则该双曲线的方程为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231654437718201/SYS201311012316544377182007_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231654437718201/SYS201311012316544377182007_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231654437718201/SYS201311012316544377182007_ST/3.png)
D.
查看答案
直三棱柱ABC-A
1B
1C
1中,若∠BAC=90°,AB=AC=AA
1,则异面直线BA
1与AC
1所成的角等于( )
A.30°
B.45°
C.60°
D.90°
查看答案