下列命题中正确的是
(1)已知
,则
是
为纯虚数的充要条件;
(2)当
是非零实数时,
恒成立;
(3)复数
的实部和虚部都是
;
(4)设
的共轭复数为
,若
,则
.
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ccf432c34997f12e40f9a4af413075.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e756b3a02933a135991d61f07d77ad7.png)
(3)复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5995592e43162a41cf2ee6197673511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
(4)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41042207515dd2e8349c805e6aee400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77697bd67c05edd399e296994c1d4b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d53aa3e4572de74b3f69cc05b3919d.png)
A.(1)(2) | B.(1)(3) | C.(2)(3) | D.(2)(4) |
11-12高二下·安徽宿州·期中 查看更多[2]
更新时间:2016-12-02 09:11:25
|
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