2013·江西赣州·三模
1 .
是虚数单位,若集合
=
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e579db390f938e41c45169ce4cdd805c.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
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2013·江西赣州·三模
2 . 已知函数
是定义在R上的偶函数,且当
时,
,则函数
的大致图象为
![](https://img.xkw.com/dksih/QBM/2013/7/15/1571280626343936/1571280631652352/STEM/d93ae5410541484f822b9003cd93049c.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2013/7/15/1571280626343936/1571280631652352/STEM/d7349e5d8e5b4860822a6f006b5a30f9.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2013/7/15/1571280626343936/1571280631652352/STEM/beb449de86db4f999569537aa7d76cc2.png?resizew=101)
![](https://img.xkw.com/dksih/QBM/2013/7/15/1571280626343936/1571280631652352/STEM/d93ae5410541484f822b9003cd93049c.png?resizew=35)
A.![]() | B.![]() | C.![]() | D.![]() |
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2013·江西南昌·二模
3 . 已知两定点
和
,动点
在直线
上移动,椭圆
以
为焦点且经过点
,记椭圆
的离心率为
,则函数
的大致图像是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b47e7bf02b3ca16f7d96b9369e51a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f61de965b9d38982e5a75af2737e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23aeb888fdb03cda5012395e8ccb2203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e394928fc147a940ec0fa7801a64141a.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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10-11高三上·江西·阶段练习
4 . 设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd3ea5f99540a5b11254cb3239a4cd7.png)
,若
时,
>0恒成立,则实数m的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd3ea5f99540a5b11254cb3239a4cd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41a85b52d149033fa86da61b74146b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275d11153a242e46ee0288037fc56fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dbdb6fea3787413ca180b1b1b958355.png)
A.(0,1) | B.(-∞,0) | C.(-∞,) | D.(-∞,1) |
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