名校
1 . 设关于
的方程
的两根为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
(1)若
,求
的值;
(2)若方程至少有一根的模为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2914555b73c954e85aa05449d767eee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a39b9354d936ff25d65386d56671d56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若方程至少有一根的模为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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名校
解题方法
2 . 已知关于
的方程
,若
是从区间
中任取的一个实数,则这个关于
的方程有实根的概率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3210a485be94aac7393018f8e9c27e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d88b9e2055fa4d970dcb15ed79de582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-06-07更新
|
167次组卷
|
2卷引用:陕西省西安市第一中学2024届高三下学期模拟考试数学(文科)试题
3 . 已知
,
,
是三个不全相等的实数且满足
则
的值是( )
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8627e8e8d56e652abe5914f7d741b3f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae24688d4c45aad43e9af0b7bbfda6b.png)
A.1 | B.![]() | C.3 | D.6 |
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名校
4 . 二次函数
是常数,且
的自变量
与函数值
的部分对应值如下表:
且当
时,对应的函数值
.下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c53fa91aecb40438f8b53eb97b70bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28b08682efa2692b052f64fe1448fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
… | -1 | 0 | 1 | 2 | … | |
… | 2 | 2 | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d599059e6b2c918ab15ee22611b6962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57458464618fcf619375a93d3c66d69.png)
A.![]() |
B.![]() |
C.关于![]() ![]() ![]() |
D.![]() ![]() ![]() ![]() |
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解题方法
5 . 法国数学家卢卡斯在研究一元二次方程
的两个根
不同幂的和时,发现了
,
,…,由此推算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75149d101c708cf669271cad3ce936ca.png)
______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4cdd6f27334444c1884876b9e4cfe6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8d8441014892f9ad3dbaad3f89774e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62bdaecba44c33044ad3ad3e271d2884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75149d101c708cf669271cad3ce936ca.png)
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6 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd0cb64c92c6a01d89b11000b896535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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2024高一下·全国·专题练习
7 . 如图,
不共面,且
且相等,
且相等,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0247b63d3f3cc573a24ba0036899c96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e725362f254f8f39245bd3ed311d6d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2bb400160da0da6df6abbaa5fa0f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5c70782c77be805de33099687afc07.png)
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名校
解题方法
8 . 如图,已知斜三棱柱
中,底面
是正三角形,
,点O是点A1在下底面内的正投影.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b41ee0f7694690b8ca82158bf210f49.png)
(2)若点O是
的中心,求高度A1O;
(3)在(2)的条件下求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40dcce3e3b82ddca1e9f021ef66b5684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b41ee0f7694690b8ca82158bf210f49.png)
(2)若点O是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)在(2)的条件下求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32bbdf5dbf9df96742624ada95c36146.png)
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名校
9 . 设
,
为方程
的两个根,且
,则
的值为______ .
![](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/6962df3ea2decdbca9a1c57cb99ebbf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63fcf4f378df128fed4c474bf7b546e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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10 . 设
是方程
的一组解,计算:
(1)
;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad0086651e05c716cec1ba31cf09f1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821dc5767ac7967687426e4b9c46c918.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b859b72b8127df011d0b3032d2c3ff3e.png)
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