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1 . (1)在复数范围内解方程:
(i为虚数单位);
(2)设系数为整数的一元二次方程
的两根恰为(l)中方程的解,求
的最小值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f31bce2a133fdf2231046fa43cb4f149.png)
(2)设系数为整数的一元二次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a343d47de28db5748a6f0a8c6f4715d7.png)
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2 . 化简:
(1)计算:
;
(2)在复数域
内解方程:
.
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ee93ab53254ad067a8ce4a00eb2aff.png)
(2)在复数域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8646eaa05bfde39d27813c301a076420.png)
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解题方法
3 . (1)在复数范围内解方程:
;
(2)若
为(1)中方程的一个解,
,求实数
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd505c43f4791914cc43b917f88c33fe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12bc895b23f5466d0e49e5637ed456b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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解题方法
4 . (1)在复数集中解关于
的方程:
;
(2)在复数集中解方程:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d60f229f406c8dd5a6f61fe3b3351f.png)
(2)在复数集中解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87842874b71b1bc5e87b25acb1e2254.png)
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5 . 在复数集中,解方程
.
解:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca4714f88fa5f56eaf51df690fd8bae.png)
即![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30dd6649e55a1a27a67a62d8515d25e4.png)
解得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277b835e4ccd3eb574ece09ad834f0de.png)
方程的解是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277b835e4ccd3eb574ece09ad834f0de.png)
请你仔细阅读上述解题过程,判断是否有错误,如果有,请指出错误之处,并写出正确的解答过程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65ee784486f7e9c92803df3d54055d3.png)
解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca4714f88fa5f56eaf51df690fd8bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eee9d777a25144a9ec214f9ec8397ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30dd6649e55a1a27a67a62d8515d25e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d00b7fa6e3061c9397081e78d33f5e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277b835e4ccd3eb574ece09ad834f0de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277b835e4ccd3eb574ece09ad834f0de.png)
请你仔细阅读上述解题过程,判断是否有错误,如果有,请指出错误之处,并写出正确的解答过程
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解题方法
6 . 已知关系
,
的方程组
有实数解,求实数
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c53a91f4f5fa63d444170629bbc52e48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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2020-03-01更新
|
121次组卷
|
2卷引用:人教A版(2019) 必修第二册 突围者 第七章 第一节 课时1 数系的扩充和复数的概念
名校
解题方法
7 . (1)计算
;
(2)已知关于
的方程
有实数解,求纯虚数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6e91f961e6c375860251f88519329.png)
(2)已知关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752a8ba32cdcfb5d8e77f2f84d5acdb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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8 . 已知关于x,y的方程组
有实数解,求实数a,b的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e5e7909b79e863c3cd220e7a9fca6a.png)
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2020-01-31更新
|
178次组卷
|
5卷引用:人教B版(2019) 必修第四册 逆袭之路 第十章 10.1.1 复数的概念
人教B版(2019) 必修第四册 逆袭之路 第十章 10.1.1 复数的概念陕西省榆林市子洲中学2018-2019学年高二下学期期中数学(文)试题(已下线)第七章 7.1.1 数系的扩充和复数的概念(作业)-【上好课】2020-2021学年高一数学同步备课系列(人教A版2019必修第二册)第五章 1.1复数的概念-北师大版(2019)高中数学必修第二册第五章复数 第一节复数的概念 课后习题 2020-2021学年高一数学北师大版(2019)必修第二册
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9 . (1)计算:的值;
(2)在复数范围内解关于的方程:
;
(3)设复数,
满足
,
,求
的值.
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解题方法
10 . 1799年,哥廷根大学的高斯在其博士论文中证明了如下定理:任何复系数一元
次多项式方程在复数域上至少有一根(
).此定理被称为代数基本定理,在代数乃至整个数学中起着基础作用.由此定理还可以推出以下重要结论:
次复系数多项式方程在复数域内有且只有
个根(重根按重数计算).对于
次复系数多项式
,其中
,
,
,若方程
有
个复根
,则有如下的高阶韦达定理:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68be203b2490ecce4c0e2eadeb5d911b.png)
(1)在复数域内解方程
;
(2)若三次方程
的三个根分别是
,
,
(
为虚数单位),求
,
,
的值;
(3)在
的多项式
中,已知
,
,
,
为非零实数,且方程
的根恰好全是正实数,求出该方程的所有根(用含
的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e167b43045b3297248e334c41c621b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b024d78f428194127b5534f948810def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7230de53663c75658c58bbf206a0085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bed25da42194b5a81d123933d5704f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd3759b3561834cdc5b499b91f3850d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83590c4a7ea5636843dd4b60c67cb40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68be203b2490ecce4c0e2eadeb5d911b.png)
(1)在复数域内解方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4800c5aa0e5b70b2141541cbd3853e34.png)
(2)若三次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac603c0b3d1d7fd42bd50222b6ab94d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6755cd39b121a0dd2a14da8d43c1fff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ddb97874a62bb5530514a467d64af13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8079c5a2d8674d322f7abe6d4ef4a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5818ede14d21f6df9ef9c2bfe09286c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b024d78f428194127b5534f948810def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cb3db0a99f86232e0cf3e55c789ea99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2e2674707c28eddd3f3ab60f73f54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c37d6353f394a5704a92113908a5c3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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