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已知向量=(-,-1),=(,),且∥,则α在( ) A.第Ⅰ象限 B.第Ⅱ象限...
已知向量
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=(-
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,-1),
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=(
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,
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),且
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∥
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529007_ST/6.png)
,则α在( )
A.第Ⅰ象限
B.第Ⅱ象限
C.第Ⅲ象限
D.第Ⅳ象限
考点分析:
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已知
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,|
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|=2,|
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|=3,且3
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+2
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与λ
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-
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垂直,则实数λ的值为( )
A.
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B.1
C.
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D.
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