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已知复数z=a+i(a>0,i是虚单位),若,则的虛部是( ) A. B. C....
已知复数z=a+i(a>0,i是虚单位),若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792606602/SYS201311012223417926066000_ST/0.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792606602/SYS201311012223417926066000_ST/1.png)
的虛部是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792606602/SYS201311012223417926066000_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792606602/SYS201311012223417926066000_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792606602/SYS201311012223417926066000_ST/4.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792606602/SYS201311012223417926066000_ST/5.png)
考点分析:
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,其中a>0且a≠1.
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792452672/SYS201311012223417924526020_ST/3.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792452672/SYS201311012223417924526020_ST/4.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792452672/SYS201311012223417924526020_ST/5.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792452672/SYS201311012223417924526020_ST/6.png)
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阅读与理【解析】
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792452672/SYS201311012223417924526018_ST/0.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792452672/SYS201311012223417924526018_ST/1.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792452672/SYS201311012223417924526018_ST/3.png)
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计算:(1)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792452672/SYS201311012223417924526017_ST/0.png)
;
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792452672/SYS201311012223417924526017_ST/1.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222341792452672/SYS201311012223417924526017_ST/2.png)
的值.
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