1 . 求下列函数的单调区间.
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2971e4442503117b7f71fff01776ebc3.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180c8eb8b06cf2624bec4a72c10dfd71.png)
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解题方法
2 . 已知
的三个内角A,B,C的对边分别为a,b,c,且
.
(1)求证:
为等腰三角形;
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0e65f3ca149022d8a0ee5f70e9fa776.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35639227440e8dc58074332230523d9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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3 . 如图,这是缠线用的线拐子,在结构简图中,线段AB与线段CD所在直线异面垂直,E,F分别为AB,CD的中点,且
,
.使用线拐子时使丝线从点A出发,依次经过D,B,C,又回到点A.这样一直循环,丝线缠好后从线拐子上脱下,这称为“束丝”.若图中
,则丝线缠一圈的长度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6cc3789c0e9b7d1226aa0de3327599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131b630c661eff546537a530140f3434.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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今日更新
|
8次组卷
|
2卷引用:贵州省遵义市2023-2024学年高二下学期6月月考数学试题
4 . 在四棱锥
中,底面
为平行四边形,E为
的中点,F为
的中点,
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0f4748c03eee1158c8f4dd1356280b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b76ac232477ac6d4b0a36eded969d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14390e9b6b44472bdc7a131133ab39b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cd14dfc0024459f9d8e594c95c5106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07dcf0b16163e0e0e0c0f248466ee7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d627b9a5b268fe69aa466f7c465c5f3f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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5 . 过点
向圆
作两条切线,切点分别为
,若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fffd1af70bfee78356fc7c515c283730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675fc8ea457e0ceb6c0adf455d8a9c3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4215ae359227ff75071903accff4feba.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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6 . 已知
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f3e7a49df8562ba5c8e3ddf06850b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac2bb2f67ddcbbbf522ea395dca2941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9fe6aae6b2ec5a4d5964cf97963a8b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
7 . 已知函数
的图象与
轴交于点
,且在
处的切线方程为
,记
.(参考数据:
).
(1)求
的解析式;
(2)求
的单调区间和最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc05f752a777614011647451889874cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a87dbf8a0849b60206932ca8e8401af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2b2f10a84d9700f906e4f8f74b0817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b7843538ce5376655b5d4f269798af5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c49ca8562b98657ca9c499093f7233.png)
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名校
解题方法
8 . 已知向量
,则“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013b1423e5cff4d3f20c6346a100e4a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc66cd5ccd5a579a42c6a241c62d764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780cba61bee49b5b5c51390969741a69.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
今日更新
|
105次组卷
|
4卷引用:东北三省四城市联考暨沈阳市2024届高三下学期数学质量检测(二)
东北三省四城市联考暨沈阳市2024届高三下学期数学质量检测(二)吉林省长春市2024届高三下学期三模数学试题湖北省沙市中学2024届高三下学期模拟预测数学试题(已下线)第四套 艺体生新高考全真模拟 (三模重组卷)
9 . 某校为了解高二段学生每天数学学习时长的分布情况,随机抽取了100名高二学生进行调查,得到了这100名学生的日平均数学学习时长(单位:分钟),并将样本数据分成
,
,
,
,
,
六组,绘制如图所示的频率分布直方图.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/21/7e9a0f6d-eea7-4276-8681-7eefa03c7e07.png?resizew=222)
(1)若该校高二段有800名学生,估计该段日平均数学学习时长不低于80分钟的学生有多少名?
(2)估计该100名学生的日平均数学学习时长的平均数和第75百分位数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fc138be9688253cbdeae2808eb74ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/486c7705dbd7b7b9ec5dd17b4891088b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea146d8ec45e63ad14683fd31064de66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77699e3d1ddc6e698a640573a7ef787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d90faf85d1548242098a6fe3accd84f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef1a32a9f2b04fc931c6a0da0b7485e2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/21/7e9a0f6d-eea7-4276-8681-7eefa03c7e07.png?resizew=222)
(1)若该校高二段有800名学生,估计该段日平均数学学习时长不低于80分钟的学生有多少名?
(2)估计该100名学生的日平均数学学习时长的平均数和第75百分位数.
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解题方法
10 . 若正数
,
,
满足
,且
的最小值是4,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](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/b8d65e4902acac49cf0cfb53587354a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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