满分5 >
高中数学试题 >
已知、是不共线的向量,=λ+,=+μ(λ,μ∈R),那么A、B、C三点共线的充要...
已知
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803004_ST/0.png)
、
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803004_ST/1.png)
是不共线的向量,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803004_ST/2.png)
=λ
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803004_ST/3.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803004_ST/4.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803004_ST/5.png)
=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803004_ST/6.png)
+μ
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803004_ST/7.png)
(λ,μ∈R),那么A、B、C三点共线的充要条件为( )
A.λ+μ=1
B.λ-μ=1
C.λμ=-1
D.λμ=1
考点分析:
相关试题推荐
对任意非零实数a、b,规定a⊗b的运算原理如图所示,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803003_ST/0.png)
=( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803003_ST/images1.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803003_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803003_ST/2.png)
C.1
D.-1
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803002_ST/0.png)
的展开式中,常数项等于15,则实数a=( )
A.1
B.±1
C.2
D.±2
查看答案
函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803001_ST/0.png)
是( )
A.最小正周期为π的偶函数
B.最小正周期为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803001_ST/1.png)
的偶函数
C.最小正周期为π的奇函数
D.最小正周期为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803001_ST/2.png)
的奇函数
查看答案
复数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803000_ST/0.png)
(i是虚数单位)在复平面上对应的点位于( )
A.第一象限
B.第二象限
C.第三象限
D.第四象限
查看答案
已知函数f(x)=log
a(a
x-1)(a>0且a≠1).求证:
(1)函数f(x)的图象在y轴的一侧;
(2)函数f(x)图象上任意两点连线的斜率都大于0.
查看答案