解题方法
1 . 某市开展“安全随我行”活动,交警部门在某个交通路口增设电子抓拍眼,并记录了某月该路口连续10日骑电动摩托车未佩戴头盔的人数
与天数
的情况,对统计得到的样本数据
作了初步处理,得到下面的散点图及一些统计量的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/19/0aaac424-3688-4c46-9668-42819e4498f9.png?resizew=165)
表中
,
.
(1)依据散点图推断,
与
哪一个更适合作为未佩戴头盔人数
与天数
的回归方程类型?(给出判断即可,不必说明理由)
(2)依据(1)的结果和上表中的数据求出
关于
的回归方程.
(3)为了解佩戴头盔情况与性别的关联性,交警对该路口骑电动摩托车市民进行调查,得到如下列联表:
依据
的独立性检验,能否认为市民骑电动摩托车佩戴头盔与性别有关联?
参考公式:
,
,
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b4829b8c04f68d08b4272f1e5b7d0c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/19/0aaac424-3688-4c46-9668-42819e4498f9.png?resizew=165)
![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
5.5 | 8.7 | 1.9 | 301 | 385 | 79.75 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7179f49001d08c5011a1dcbfdc7930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4beaf3d206d85e2e6c8d25ab79b62e1c.png)
(1)依据散点图推断,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b447ac3d1a965572c31b6e4c18d4b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a9622a53d958999eecaefc85597b52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)依据(1)的结果和上表中的数据求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)为了解佩戴头盔情况与性别的关联性,交警对该路口骑电动摩托车市民进行调查,得到如下列联表:
性别 | 佩戴头盔 | 合计 | |
不佩戴 | 佩戴 | ||
女性 | 8 | 12 | 20 |
男性 | 14 | 6 | 20 |
合计 | 22 | 18 | 40 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f81f285940b14b97f368469121efab.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07c226c805bf76bc0ad35c45806feb73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b38cfee12dbeeab57c707dca8643538a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
![]() | 0.15 | 0.10 | 0.05 | 0.025 | 0.010 | 0.005 | 0.001 |
![]() | 2.072 | 2.706 | 3.841 | 5.024 | 6.635 | 7.879 | 10.828 |
您最近一年使用:0次
解题方法
2 . 已知函数
及其导函数
的定义域均为
,记
,函数
的图象关于点
对称.若对任意
,有
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c765461ae1a6c70f5cbdcb6c932a22b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb8a26ff8e5fd2a9887010217104f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ba3d3e46977fcbe5b71f8bb9df4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ff15f569e328b5df29040ebe788753.png)
A.![]() | B.![]() ![]() |
C.![]() | D.![]() |
您最近一年使用:0次
3 . 已知
分别为
三个内角
的对边,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
______ ;若
,
,
,
,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f2599ca8b6b683e57a82699c8b1ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7af7c5df749c6fa9bbe87faa72c66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99eb4f079ec739c81a07d11a0939834b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12dcfb8f3fc0ac45d50782c3f248672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187ee1ea3b7e47a6283314322e5decf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a6c03c053e0d74a04dd5142f0c37fc6.png)
您最近一年使用:0次
4 . 已知数列
,
,函数
,其中
,
均为实数.
(1)若
,
,
,
,
,
(ⅰ)求数列
的通项公式;
(ⅱ)设数列
的前
项和为
,求证:
.
(2)若
为奇函数,
,
,
且
,问:当
时,是否存在整数
,使得
成立.若存在,求出
的最大值;若不存在,请说明理由.(附:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2b44ac9ffc5dd71901d5cae704f059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09881de0dc186bbcd1e60eb00159ee97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f2599ca8b6b683e57a82699c8b1ebb.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b970d657304931a9d5cecdb044968f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a783088120d67cc98936081e80fb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32003b56a60c9977c5d5d667c4136f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385275d29d8c8a7841eaeaa3dfab2cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b14938503c29201f32d30deda61db3.png)
(ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
(ⅱ)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411bfe81694849b77de8b87f2651975a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43af3d8ebe0e5f0a905d42d29afe6f6f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e442aaf3fda101960c18cc41de1614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d39c60d4618060bbdc332282f0a0dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f7cc67b3e263a2562be3c4c80dd5a5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfb7ad7e6f4bbe0ec8dc3bec7d49025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/570c49bcd783ed65a16b7bc565347094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e474d29ab7f3a4e404f593e90ae8b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c1868215cf7dbeb9dd228d2cede3e9.png)
您最近一年使用:0次
解题方法
5 . 下列函数对于任意
,都有
成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42fd7af568e3d9f444beb0ff41426477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1bedaf3854b48806b82b3b804451cf8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
6 . 已知双曲线
的焦点在圆
上,且圆
与直线
有公共点,则双曲线
的离心率的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec053f40802aa99a5e4c02f2f0b3fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cda61fa0a7635adad254b34a65654ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 已知曲线
在点
处的切线与抛物线
也相切,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ecb869dc126c656104ae1a1a044b583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29343388ca8b33dc98325e65382b38a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071d4c1556de22088445f191a80b8a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.0 | B.![]() | C.1 | D.0或1 |
您最近一年使用:0次
8 . 已知函数
.
(1)求函数
的单调递增区间;
(2)若函数
有且仅有三个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a944f056d09785e9e3e859601bee6ae.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6af861abcb2667803bb5985c0ae55a7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解题方法
9 . 下列说法正确的有( )
A.若角![]() ![]() ![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若扇形的周长为![]() ![]() ![]() |
您最近一年使用:0次
10 .
的展开式中常数项是______ .(用数字作答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a5b478c3e9d64e05bf1f4534425c502.png)
您最近一年使用:0次