2024·全国·模拟预测
1 . 在
中,点D,E都是边BC上且与B,C不重合的点,且点D在B,E之间,
.
(1)求证:
.
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531f165d0a2cc7290d181c2d46f6037f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eaffc765d90d879a54c060f051aa108.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ed8169e17a96542e3df21ccaf0c8159.png)
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名校
2 . 设n次多项式
,若其满足
,则称这些多项式
为切比雪夫多项式.例如:由
可得切比雪夫多项式
,由
可得切比雪夫多项式
.
(1)若切比雪夫多项式
,求实数a,b,c,d的值;
(2)对于正整数
时,是否有
成立?
(3)已知函数
在区间
上有3个不同的零点,分别记为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27a496e3bd84636a630b74ff7eb8587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a324d249a3bd683015e6fb6883bc4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb54c94f215d294a68aae1111c4f83a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9eb1248ec39be5efeefa829db095928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fdfb3b6462b724510577f3f11ca6ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c91d0d02d04a3f1b777b0d86e2372e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941da3ce63a15fecbb77e4d8ade8fcf7.png)
(1)若切比雪夫多项式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07821e71f17322d3b3555d07bceb8d8.png)
(2)对于正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf41b2793efa0b332fe039341370ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40dc60aa4ff5458830ea81ef76148ed8.png)
(3)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daaf6fb508f82d4e9d50a708ae2d9814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ba3d3e46977fcbe5b71f8bb9df4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2c5f7b63a7dd6d0155f9d38158fcf1.png)
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2024-05-03更新
|
686次组卷
|
3卷引用:湖南省长沙市雅礼中学2024届高三下学期5月模拟(一)数学试卷
2024高三·全国·专题练习
解题方法
3 . 已知
的内角A,B,C所对的边分别为a,b,c,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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2024高三·全国·专题练习
4 . 下列式子的值与
的值相等的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed64be1f6d8b8a12cee2f621fdb7ff7.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024高三·全国·专题练习
解题方法
5 . 已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa558d74cfc40ba4a8086e2c498ea8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/006c59eaabe9d3eea8c3823bf95b38de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f978654feff5f39593a8645eb44b90.png)
A.1 | B.![]() | C.-![]() | D.-1 |
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2024高三·全国·专题练习
解题方法
6 . 已知
的内角A,B,C的对边分别为a,b,c,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() |
C.若![]() |
D.若![]() ![]() |
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解题方法
7 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa21f3116751888561881e3f299079d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f01c217b97d30b2a56b8ea410f5a69f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024高三·全国·专题练习
解题方法
8 . 已知
的边
,且
,则
的面积的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76acbdb5fa7a056a870bc194d170f0df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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9 . 使得不等式
成立的一个充分不必要条件是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7174271a4c7ec40a7e2f7cbc5dd04c85.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024高三·全国·专题练习
解题方法
10 . 已知
为锐角,且
,
.求:
(1)
的值;
(2)
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/474929dd8e89d9ce37448ae72b48d04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9330f5a1902fe99fc5edd744fbe9146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d98ca14c3532f75d6f453f9ac060603a.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c1f914da4657eca7865982b130b299.png)
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