1 . 若函数
有一个二重零点,则a的所有可能取值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8ccc865a74354e5de89746c76d1a2a.png)
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2 . (1)对实系数的一元二次方程可以用求根公式求复数范围内的解,在复数范围解方程
;
(2)对一般的实系数一元三次方程
(
),由于总可以通过代换
消去其二次项,就可以变为方程
.在一些数学工具书中,我们可以找到方程
的求根公式,这一公式被称为卡尔丹公式,它是以16世纪意大利数学家卡尔丹(J. Cardan)的名字命名的.卡尔丹公式的获得过程如下:三次方程
可以变形为
,把未知数
写成两数之和
,再把等式
的右边展开,就得到
,即
.将上式与
相对照,得到
,把此方程组中的第一个方程两边同时作三次方,
,并把
与
看成未知数,解得
于是,方程
一个根可以写成
.
阅读以上材料,求解方程
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed344791b8b035ca04d4b5af7364cae5.png)
(2)对一般的实系数一元三次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ad9d68d15b5d5121fcf99ebddaa986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae0f3c81f415857813838d4b9b714d56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea05ab19c339e26f8268fbc7b6e918d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5dd275a6062b21f9c3e9155c7e0ba62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5dd275a6062b21f9c3e9155c7e0ba62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ead1b77b69e6b51d6d483331fd01d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0bed1a02239821a616bc173181e7ed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c26aacdd3362aa65b2966045cbfcddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f02c3aa1326c9b1e069b6997cd29bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11792ad247341c0dbc80663dd0fa6f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ead1b77b69e6b51d6d483331fd01d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e8aa11c220ffef18a553784e1ecc16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491db400b0e81be11e3fd8729fe61a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36accab23dbd172687769aea43e5781c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411a315870ed3e6d0e8ea885f1a04bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9930c09269f4f03794e38c17f6da67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5dd275a6062b21f9c3e9155c7e0ba62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d63387694fd1caafce80adfb43c86b.png)
阅读以上材料,求解方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c3d494147195cf4f5e1fa3f6f5a0b9.png)
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名校
解题方法
3 . 已知函数
.
(1)若
在
处取得极值
,讨论
的单调性;
(2)若存在实数c,使得方程
的三个实数根
满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5935439465b9a6ab04657d4288ce035e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若存在实数c,使得方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677c21e324ed0a4ba6af191dff3277be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb47fab19563ac49c5bc07c11b2688b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7728c3702f569ab602be6728fb4503f9.png)
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4 . 求所有正整数
,满足正
边形能内接于平面直角坐标系
中椭圆
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8715a3f984d2627afd7c40c61347b7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
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5 . 若m、n都是正实数,方程
和方程
都有实数根,则m+n的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b97c14931ac6cf5184ef7b7697e55b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dffd64316ab5cd086e8b8dc8a5bfe994.png)
A.4 | B.6 | C.8 | D.10 |
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6 . 设
、
是无穷复数数列,满足对任意正整数n,关于x的方程
的两个复根恰为
、
(当两根相等时
).若数列
恒为常数,证明:
(1)
;
(2)数列
恒为常数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80289c798034033f2f7cfcd7590f2344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3002f56900c2924bfd79fc3865b0a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52cabfa2464501decf05aed007cbaf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841f4ea50fa0c2b4c6e47dc04597abba.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561d594ed04e6652c75dac56259f4292.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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7 . 已知复数
满足方程:
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e0aeeb125cfb42e33094594d4381f5.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd2adf5f17390c06fd5e8de8e729257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e0aeeb125cfb42e33094594d4381f5.png)
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2021-08-07更新
|
844次组卷
|
5卷引用:江苏省南通市海安高级中学2024届高三上学期1月学情调研数学试题
8 . 设曲线
:
,若对于任意实数
,直线
与曲线
有且只有一个交点,则
的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd685c38fda0219f2733a349d3d0747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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解题方法
9 . 关于x的实系数方程
.
(1)设
(i是虚数单位)是方程的根,求实数a,b的值;
(2)证明:当
时,该方程没有实数根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6cbf4c4e4fb18b5e45be298b58ec049.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fab740036f2ecc7858e0ce7e614688.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300db71a4fd3c0527282211db7d18f36.png)
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2020-02-12更新
|
1120次组卷
|
3卷引用:第十二章 复数(知识归纳+题型突破)-单元速记·巧练(苏教版2019必修第二册)
(已下线)第十二章 复数(知识归纳+题型突破)-单元速记·巧练(苏教版2019必修第二册)人教A版(2019) 必修第二册 过关斩将 第七章 复数 本章复习提升第五章 复数 测评-北师大版(2019)高中数学必修第二册
名校
10 . 若
是方程
的一个根,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff6d838c156e98b50813db582fcf7aac.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603f89ec552cf83c2882440b949fe688.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a054a5644d58e82e4b3d9e820e98e8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff6d838c156e98b50813db582fcf7aac.png)
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2020-02-19更新
|
3702次组卷
|
9卷引用:广东省广州市玉岩中学2023~2024学年高一下学期期中考试数学试卷