i为虚数单位,复数
的虚部为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34773a6560618180181cb998d1e4a0a7.png)
更新时间:2019-12-26 18:13:50
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【推荐2】已知复数
(
为虚数单位,
为实数)为纯虚数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06de9ced5c9955affe46ac3b26ee6ad6.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196e5fa55e6e09f8d16fbdb98c8775fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06de9ced5c9955affe46ac3b26ee6ad6.png)
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【推荐1】下列关于复数的命题,是真命题的是______ .(填序号)
①
;②若
,则
;
③若
,则
是纯虚数;④对任意实数
,都有
是虚数.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40cf8a903a0b778c83047c6ed0ee29e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70c2519610d6d1d6d0855b0f27dfc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ec0a4dcfaefaa1a22c9dd79e15145d.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ea094e511400e3c48f103fb958ca60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6885bb2167fda6107fd05c94a2c52bf6.png)
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