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设向量,则下列为与共线的充要条件的有( ) ①存在一个实数λ,使得或; ②; ③...
设向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103095909743293072/SYS201311030959097432930008_ST/0.png)
,则下列为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103095909743293072/SYS201311030959097432930008_ST/1.png)
与
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103095909743293072/SYS201311030959097432930008_ST/2.png)
共线的充要条件的有( )
①存在一个实数λ,使得
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103095909743293072/SYS201311030959097432930008_ST/3.png)
或
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103095909743293072/SYS201311030959097432930008_ST/4.png)
; ②
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103095909743293072/SYS201311030959097432930008_ST/5.png)
;
③
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103095909743293072/SYS201311030959097432930008_ST/6.png)
; ④
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103095909743293072/SYS201311030959097432930008_ST/7.png)
.
A.1个
B.2个
C.3个
D.4个
考点分析:
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