名校
1 . 已知
,复数
.
(1)若
是实数,求
的值;
(2)若
对应的点在第一象限,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db318d49893af7f7ae56cfc60059d4ac.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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名校
2 . 已知
是复数,且
为纯虚数,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3d52102986641aa6f6ec16d690bc56.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() ![]() |
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名校
3 . 已知
为虚数单位,复数
,其中
为正偶数,
.则当
取到最小值时,
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/819fa0b7787ac1288da8e9c7464364f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6daaa4dfd029caf8985c4fc500c2c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cad3aaeb5b444feb152378278f68863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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名校
4 . 设
,关于x的一元二次方程
的两根为
、
.
(1)若
、
为虚数,满足
且
,求
和m的值;
(2)若
,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c2ec772c87c0ef5114013fb46ebe00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635c504a617ede33eb82dad4d5951f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2246f3a81afa524a0d2cd52a7659231d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05c8c296108fe7875d7c0a072d6d9446.png)
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名校
5 . 设复数
,
.
(1)若
是实数,求
;
(2)若复数
在复平面上对应的点在第二象限,求实数
的取值范围;
(3)若复数
满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3949894948e3bc57fa513cf84e2af364.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab15cfa691e78c4caf7d23046df9eca.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e34b88f343ca5a4c29057465541b9cf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe615164ed2995bdeea0f5b0ba94231.png)
(2)若复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e3f4ab6f61446e83d8fcc1af0d0894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df2ce3cf2a3b683e4ab69ebe3767f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de971553ea8a66d7849b138a4a0625c5.png)
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解题方法
6 . 已知复数
(其中
是实数),则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64e85361b499309607d975d6dd026918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() |
B.当![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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名校
7 . 已知复数
.
(1)若
,求
;
(2)若
,且
是纯虚数,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28229f5b710ea4e52b618ae9d3d20e9b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a742fe334d93ce636a7e98d612f87678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bafa6921a0f5987d5f1fc568cf54e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26dd5edae8097274a8a4fd56bc1b4c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
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解题方法
8 . 若复数
满足
,且
为纯虚数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d67321ace1e6b3be0fc0e5e8130022.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655877b57340a8a83c9d4c2607837c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f697049110d338b2cfeafd0a084a9d34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d67321ace1e6b3be0fc0e5e8130022.png)
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9 . 若
,
,且
为纯虚数,则
在复平面内对应的点位于第______ 象限,实数
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80d6b34d49a8fe96637a7429fc883ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03f9b805c034ffdc542b03e5fa7ac9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a4bd86abf556fccaec6c5a0999a0acc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
10 . 已知
为虚数单位,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
A.复数![]() ![]() |
B.复数![]() ![]() |
C.若![]() ![]() ![]() |
D.若复数![]() ![]() |
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