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在复平面内,O是原点,向量对应的复数是2-i(其中,i是虚数单位),如果点A关于...
在复平面内,O是原点,向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992002_ST/0.png)
对应的复数是2-i(其中,i是虚数单位),如果点A关于实轴的对称点为点B,则向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992002_ST/1.png)
对应的复数是( )
A.-2-i
B.-2+i
C.2+i
D.1-2i
考点分析:
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已知
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992001_ST/0.png)
=(1,2),
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=(0,1),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992001_ST/2.png)
=(k,-2),若(
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+2
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)⊥
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,则k=( )
A.2
B.-2
C.8
D.-8
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已知向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992000_ST/0.png)
=(1,2),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992000_ST/1.png)
=(1,0),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992000_ST/2.png)
=(3,4).若λ为实数,(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992000_ST/3.png)
+λ
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992000_ST/4.png)
)⊥
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992000_ST/5.png)
,则λ=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992000_ST/6.png)
B.
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C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992000_ST/8.png)
D.
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