解题方法
1 . 设虚数z满足
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24aebdd8934eddd13197adfcc5f6a203.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
2 .
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1927dd292cf2100b7da79371884c58c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 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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4 . 设
是方程
的三个根,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ed42214330730cac99e08924ba6799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a47b8d8f61abaac87e1795174a1fd2.png)
A.![]() | B.![]() |
C.![]() | D.以上答案都不对 |
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5 . 设p,q均为不超过100的正整数,则有有理根的多项式
的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e8992253b0acad898a064c8ab086ce.png)
A.99 | B.133 | C.150 | D.前三个答案都不对 |
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6 . 设a,b,c,d是方程
的4个复根,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb1f12aa4b7bb3fdb6e6ffe9ed6620f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/572de66c177f46a541e594449b688e46.png)
A.![]() | B.![]() | C.![]() | D.前三个答案都不对 |
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7 . 已知
,
是方程
的两个根,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67cb6e5c9bbc0e0efcda85ebd2738fa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9579d754be043d7c0da7bf68d33e591f.png)
A.2008 | B.8002 | C.2009 | D.2020 |
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8 . 设
,
是方程
的两个实数根,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12a4eecd249473a831d0ee472470240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9565876bc50bceb63e5793c8c67a9032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f0acd0954fe2e448912ad5c3f05ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3a2117639ee0238b78ae5f1b1902fe.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
9 . 若方程
的两根为
,
,其中A,B为三角形内角,则实数p的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d75c917c4c03ddbb78405354b44c01aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a24a8f5e8fb89381f8add6549170345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
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2020高三·全国·专题练习
解题方法
10 . 已知
、
均为整数,且
、
,则方程
有一正一负两根的概率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831e181796cfed7a605264b361bbb428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783a7b78d895784b4af75b962bd40f07.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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