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在△ABC中,∠A=90°,AB=1,AC=2.设点P,Q满足,,λ∈R.若=-...
在△ABC中,∠A=90°,AB=1,AC=2.设点P,Q满足
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727025_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727025_ST/1.png)
,λ∈R.若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727025_ST/2.png)
=-2,则λ=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727025_ST/3.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727025_ST/4.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743972767/SYS201311031027297439727025_ST/5.png)
D.2
考点分析:
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