解题方法
1 . (1)在复数范围内解关于
的方程:
;
(2)设
是虚数单位,求复数
为纯虚数的充要条件;
(3)在平行四边形ABCD中,点A,B,C分别对应复数
,求点
对应的复数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90620bf3fa40a5a0d684ff303cb8979b.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c61aec19ff1181bcef9271f4458b9887.png)
(3)在平行四边形ABCD中,点A,B,C分别对应复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8376ebaf7efbc15dbdb5e196cc9cf221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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2 . 已知复数
,
,其中
为虚数单位,若
.
(1)若
为
的共轭复数,求
在复平面内对应的点的坐标;
(2)若复数
是关于
的方程
的一个根,求实数
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c0fda5d04e27796f64c5b3a09daa58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e72f6b2ef3329828cb8fc873eeba7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856c574c55dc238912f33f6900622b2d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41042207515dd2e8349c805e6aee400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41042207515dd2e8349c805e6aee400.png)
(2)若复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f294d917b3efe5dbd116cca5d639e9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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名校
3 . 已知
为虚数,且
为实数.
(1)求证:
;
(2)若
为纯虚数,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ae50806d8c14f0275864b30e9f30a7.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70c2519610d6d1d6d0855b0f27dfc5e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecce6cb2b1ee01a28ebe39d65e21fd94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
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解题方法
4 . 关于
的方程
.
(1)若
是方程
的一个虚根,求
的值;
(2)若
,
是方程
的两个虚根,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f06720e2375c2d0473d5e4fa93ef5247.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf9aad7eebf23ced14665d3a11e4e5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f4e863987418d465678dc1c90fa7da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216877ea6e839a6fa78be498529b66eb.png)
(2)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/af38a4a530eeb0e653729fb4ad300b83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4932d1dc05c81683825bffac5a6ba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
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名校
解题方法
5 . 已知
为虚数单位,
是实系数一元二次方程的两个虚根.
(1)设
满足方程
,求
;
(2)设
,复数
所对的向量分别是
与
,若向量
与
的夹角为钝角,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff994933e5444325ae520801fa3d03cb.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff994933e5444325ae520801fa3d03cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2f1d87ff20182c4809b5da84080a36c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff994933e5444325ae520801fa3d03cb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db04f988e1aba18b0a3470d332908c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff994933e5444325ae520801fa3d03cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f7c042f3cdc2cd9c63e38629a5cf3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437dc907211c5934f938d869f6b19e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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6 . (1)求方程
的根,并判断它们是否共轭;
(2)若复数满足
,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9075fb6184add4c2b3be66bab48ec5.png)
(2)若复数满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839ba7c0f1fc30151d18a2e337951dd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6371658485ad1afc0d054c1b5e70ee5f.png)
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7 . 已知复数
(
,
,且
),且
是实数.
(1)求
的值;
(2)求
的取值范围;
(3)求
的最小值.
![](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/2dd0914dc4d4c7f75710ff460a286fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea271449079f5c1599f6199c611e1995.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f447f2b9da66341b1acae748708788.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3882a83734b2a39d4e7a26a12d1d9c.png)
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解题方法
8 . 已知复数
,
为虚数单位.
(1)求
;
(2)若复数
是关于
的方程
的一个根,求实数
的值;
(3)若复数
满足
,求
的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d5e197fb08e9b154d752e67b4c886f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41042207515dd2e8349c805e6aee400.png)
(2)若复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f43e49552a5099a8b2a442247c65a243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
(3)若复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2bc98b171afa0261e90bc1440d3ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ff55376d53a3ce2a4d5263da876d30.png)
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名校
解题方法
9 . 已知复数
满足
为坐标原点,复数
在复平面内对应的向量为
.
(1)求
;
(2)若向量
绕
逆时针旋转
得到
对应的复数为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73cdb98431357a85578432928d724f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb0e25bbccbee4a1b9db38b49e87978.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c8dbdac37d58163920844cb5e13256.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb0e25bbccbee4a1b9db38b49e87978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49f8a63ddbca52039fa9ab44cda6b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd1c2b1808c4e4f476d8331189b7032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f6bc4ac395a4beceaf064f4df953269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a108abacd317e0ca239df19af26041d7.png)
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10 . 计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/543520fe35d5b3e4114b3c09b1de2db1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0e67d903473bc5537ed99a74deb3a6.png)
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