1 . 设
,函数
给出下列四个结论:
①
在区间
上单调递减;
②当
存在最大值时,
;
③存在
,
,使得
;
④若存在两个不同的x,使得
,则a的取值范围是
.
其中所有正确结论的序号是__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb38c2e2a9484bf5956a2c644a316de.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5a7642c9278c33a62f1ed6a7cc468fb.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/652ed11413a1e1739b5bb36cc457f4b8.png)
③存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8f4fcf665e3643097575321d14a7c65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a5aac861859447bfa43657536d7780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772de42a00014bda198747189a87ec98.png)
④若存在两个不同的x,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d75218f92d6013def9add8e470c2fb2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04576c20aeb31bb60b412a7cc4f80471.png)
其中所有正确结论的序号是
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2 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c8eae7bf6251fd35cbcfce082f9dd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
(1)当
时,若
,求x的值:
(2)若
是偶函数,求出m的值:
(3)
时,讨论方程
根的个数.并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c8eae7bf6251fd35cbcfce082f9dd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ce70cd93ab5e129a18d4df247063fc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54078c4af5b305e26b8e3faa6423e67e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5809a06357f94fc7a2156c7e7af1ed2e.png)
您最近一年使用:0次
名校
3 . 声音的强弱通常用声强级
和声强
来描述,二者的数量关系为
(
为常数).一般人能感觉到的最低声强为
,此时声强级为
;能忍受的最高声强为
,此时声强级为
.若某人说话声音的声强级为
,则他说话声音的声强为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9979f7c16b0862511fcba0eff447e9f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb4e3aa583d4e4bc997da454d5f0a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7869bd945150e2bc08e0131ea56b780e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6892ce0857f83ad8541abd61bfd955db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238014c690f09b7c14f7619953f20369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7a57dab3a465603856dd0c63bfe246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d32123578507f6faea3afcb8a4fe08f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4896768c02ff717cfddf4cacb512fd6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-02-29更新
|
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4卷引用:河南省部分学校2023-2024学年高一上学期期末大联考数学试题
4 . 某企业从2011年开始实施新政策后,年产值逐年增加,下表给出了该企业2011年至2021年的年产值(万元).为了描述该企业年产值
(万元)与新政策实施年数
(年)的关系,现有以下三种函数模型:
,
(
,且
),
(
,且
),选出你认为最符合实际的函数模型,预测该企业2024年的年产值约为( )(附:
)
![](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/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f16e835223fc827dbf0adb7fe81e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d586e481f28d2b5f11c0c2cf58e24b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91aa4d06b74cc92610d81f0933df8136.png)
年份 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 |
年产值 | 278 | 309 | 344 | 383 | 427 | 475 | 528 | 588 | 655 | 729 | 811 |
A.924万元 | B.976万元 | C.1109万元 | D.1231万元 |
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3卷引用:广东省东莞市2023-2024学年高一上学期教学质量检查数学试卷
解题方法
5 . 设函数
的定义域为
,且满足
,
,当
时,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3897bf276a0b6c2121917d39b369df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933093b52cca887f597cbe22a5467b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4bded99f59443ecf59e9744b548361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02b15967392e9855ef1677119559c7ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01745f0dff16a69a195e0d0c2c798258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62961a1ecf703df5d2bc17a3e200301a.png)
A.![]() | B.当![]() ![]() ![]() |
C.![]() | D.方程![]() |
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6 . 函数
在区间
内存在零点的充分条件可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19d987c8ca8b3a7f58dbe59d13aac74b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27e49b10fcceb2e4b0726772b434ec7.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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7 . 若函数
,恰有3个零点,则实数a的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9a68a19e5b14292edc772627a3f352.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
8 . 函数
的零点所在的区间为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ad3991ffb302f2c216fbc7f4e38a470.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
9 . 已知函数
,若方程
有4个不同实根
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffbbe1ae2cb5821189694751da879410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da3023b0765cfb1b268e29e1d01de0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c15967674c1428ed9bb4f10de8ac218.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
10 . 已知函数
若
的图象上存在关于直线
对称的两个点,则
的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/869be205b07f4d8483e7b3bc44611ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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|
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