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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
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、
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是不共线的向量,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182617818462787/SYS201310241826178184627004_ST/2.png)
=λ
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+
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,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182617818462787/SYS201310241826178184627004_ST/5.png)
=
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+μ
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182617818462787/SYS201310241826178184627004_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:
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