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已知f(x)=a(x+2a)(x-a-3),g(x)=2-x-2,同时满足以下两...
已知f(x)=a(x+2a)(x-a-3),g(x)=2
-x-2,同时满足以下两个条件:
①∀x∈R,f(x)<0或g(x)<0;
②∃x∈(1,+∞),f(x)•g(x)<0成立,
则实数a的取值范围是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124139789016246/SYS201310251241397890162011_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124139789016246/SYS201310251241397890162011_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124139789016246/SYS201310251241397890162011_ST/2.png)
D.
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考点分析:
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