解题方法
1 . 复数
,复数
使得
,则复数
的共轭复数
的模的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95423c449f5d44dd949bf3b0130946f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0bb9c60c57879d96a4497eb4e331836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2543268777eb18afe34a4994fbca6d.png)
A.1 | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 已知复数
在复平面内对应的点位于第二象限,则
的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/692635a276bef87cdbde58fc80498c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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昨日更新
|
174次组卷
|
3卷引用:云南省昆明市2019-2020学年高二下学期期中考试数学(文)试题
解题方法
3 . 已知i为虚数单位,复数z满足
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7290f9978d2e267461e6018c7ad2298c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b22e0475d82269c5d1b70dc8b87291d0.png)
A.![]() | B.![]() | C.![]() | D.0 |
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4 . 下列命题为真命题的是( )
A.若复数![]() ![]() |
B.复数![]() |
C.若i为虚数单位,n为正整数,则![]() |
D.若![]() ![]() |
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5 . 在复平面内,复数
对应的点为
,连接OZ(O为坐标原点)可得向量
,则称复数z为向量
的对应复数,向量
为复数z的对应向量.
(1)若复数
,
的对应向量共线,求实数x的值;
(2)已知复数
,
的对应向量分别为
和
,若
,求
的最小正周期和单调递增区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db95214c54cc0785b910bcf465159555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e472aea001d179c284e3687a9aacf384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb0e25bbccbee4a1b9db38b49e87978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb0e25bbccbee4a1b9db38b49e87978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb0e25bbccbee4a1b9db38b49e87978.png)
(1)若复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/809611fd121b81127a63e28464d6cb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb82bf265eca304366c15fe2e332b32.png)
(2)已知复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8773d8fc782eac6c6899a41924a51d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b67e9c461d434b2352ebbca2476a2ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a30deb1f343048675b9b231620369668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1640d3fff861f45c5eb4019943b000f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5685b1b573e5c901dfd0eb4f8892b4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
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6 . 复数z在复平面内对应的点为
,且
(i为虚数单位)的实部为4,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe30d4fc093a3469b185b296cc9be8c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0746297c455c65195e8cf1186ffba58.png)
A.复数z的虚部为2 | B.复数z的共轭复数对应的点在第四象限 |
C.若![]() ![]() ![]() | D.复数z是方程![]() |
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7 . 已知复数
.
(1)若
是纯虚数,求
;
(2)在复平面内,
对应的点位于第三象限,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f9019b482c3f771810f915db53d162.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)在复平面内,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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名校
解题方法
8 . 已知复数
在复平面内对应的点分别为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e3c5c98d5f13e7e48511ee8fa79722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38033198bf936b904a8c74db67e4cdcf.png)
A.![]() |
B.![]() |
C.满足![]() ![]() ![]() ![]() |
D.满足![]() ![]() ![]() ![]() |
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7日内更新
|
171次组卷
|
2卷引用:重庆市部分学校2023-2024 学年高一下学期期末联合检测数学试卷
解题方法
9 . 任意一个复数
的代数形式都可写成三角形式,即
,其中
为虚数单位,
,
,
,
.棣莫弗定理由法国数学家棣莫弗(1667~1754)创立,指的是设两个复数用三角函数形式表示为:
,
,则
,
,且
.若令
,则能导出复数乘方公式:
.请用以上知识解决以下问题:
(1)试将
写成三角形式;
(2)已知
,
,
,求
的值;
(3)设
,
,
,当
时,求
的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68164963a78bacd43aebe850e318c81b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579743813856e2a9183f5ec6eaaefbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d22f01ee39655ac99b954f3fff4dea2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6640bfc6d10326b8042ebb722032a699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae4ddf7b9db37f1a5dfed97eeda99397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0ca9a39621967d7ba5629ea9b12d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee88b6ebaf8934d549078a4425f570cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40d90367febdbe2b3d91f8ddeea64fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f731e3a6dae77fe25ba2eebca64c474e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc6842835e8ecfcca4bd856b9c8cb1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbabf40571217de096d5974d11a3d0f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed43030ca376eb5e3331d75f103fc762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30298b2331d51fb8f19324aeb4b55f1.png)
(1)试将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71633a2e49557741140414fd23871c0d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2f9fbd4c335cac78f1d1bcfc8e1590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc53efa0c7df310140f3b45071817507.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709153bfbc6cbe5f3b80b4890121da65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec04f844e8fd9d9b1ef835e23eaa54e2.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b40b6895776e0807c2baecbc8f33a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19339e3904e9541ff26b30ae5f1242b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70c2519610d6d1d6d0855b0f27dfc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd70236b790155cf2c8b1497464a1d9d.png)
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解题方法
10 . 若
,则
的最大值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f07ae0874c2f34741f5bde07b3891182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de971553ea8a66d7849b138a4a0625c5.png)
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