解题方法
1 . 若复数
(
),复数
.
(1)求
;
(2)若
,求实数a的值;
(3)若a=2,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898f46bc4ae3a0fa9bb39f7451df524d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab15cfa691e78c4caf7d23046df9eca.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dff9388eee5c812d183b254d13f461b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672ddb41fe987078cb16566a3bafa964.png)
(3)若a=2,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec04f844e8fd9d9b1ef835e23eaa54e2.png)
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2021-08-24更新
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139次组卷
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2卷引用:广西桂林市第十九中学2021-2022学年高二下学期期中考试数学(理)试题
2 . 下列命题中正确的是( )
A.若![]() ![]() ![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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解题方法
3 . 实数
取何值时,复数
是
(1)实数?
(2)虚数?
(3)纯虚数?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a8bf3263b641f23809564fe2df6e42e.png)
(1)实数?
(2)虚数?
(3)纯虚数?
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解题方法
4 . 已知复数
是虚数单位),且
为纯虚数.
(1)求复数z;
(2)若
求复数
的模
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4c259fa2e6642441a8754889fb8626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a60bd757c9dc02108f2190f864f8c6.png)
(1)求复数z;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef9915efb293007392fe19e4833a873.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4f492569b61473f15810439d4b5b33.png)
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解题方法
5 . 已知复数
,且
(其中
是虚数单位
则复数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d67321ace1e6b3be0fc0e5e8130022.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da0376ed3b81f578b9a487f6b24f189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f31147e311c57136d7ea0f6bac6b19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f231f1180506385a590e8a74f4d75f0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d67321ace1e6b3be0fc0e5e8130022.png)
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6 . 下列复数中是实数的是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-08-15更新
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83次组卷
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2卷引用:福建省龙岩市长汀、连城、上杭、武平、漳平、永定六校(一中)2020-2021学年高二下学期期中联考数学试题
解题方法
7 . 已知复数
(
为虚数单位),且
是实数,则实数
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee334ba72f8f7a6a3801063ab8811995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c591b9736d3329ad9bdc5a6631c797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
8 . 已知复数
(
是虚数单位)为纯虚数,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
___________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8c7a8a975c634e96535e998fd767102.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4270be81e8a9eac769170acb34345ca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579743813856e2a9183f5ec6eaaefbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8c7a8a975c634e96535e998fd767102.png)
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解题方法
9 . 实数m分别为何值时,复数z
(m2﹣3m﹣18)i是
(1)实数;
(2)虚数;
(3)纯虚数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75a8c7d572ebb3a7a425b72a169d0fb.png)
(1)实数;
(2)虚数;
(3)纯虚数.
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10 . 若
(
是虚数单位)是纯虚数,则实数a的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f30d813b6c7db0c0a6f9d62c120ee11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
A.![]() | B.0 | C.1 | D.2 |
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2021-08-13更新
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93次组卷
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2卷引用:福建省宁德市部分达标中学2020-2021学年高二下学期期中联合考试数学试题