解题方法
1 . 已知函数
满足
,且
,当
时,
.函数
.
(1)求实数
的值;
(2)当
时,求
的解析式;
(3)设
,是否存在实数
,使不等式
在
时恒成立?若存在,求实数
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0702195255c51922822a8185339b17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed670b1f668778c6243f3f7470ee7d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389c5eb9278242f235dfcb45e687f7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa755c7216812b2cd333563f6acd81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d378143a598defcc8adad769fd205173.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a0f0ee999bab322b1f5290fc8571cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670fcbf66c7c5322f9bf2bec0d157ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e7e4a025141869980b3a1aab55b8a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb48434bdcafb5e084fc0b6396cb9469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2 . 已知函数
对一切实数
,都有
成立,且
,
其中
.
(1)求
的解析式;
(2)若关于x的方程
有三个不同的实数解,求实数k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587d3909a3d586e11cd3e902066976d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fae86b38bf45a6ddf9986a7ce6b2a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196be101149acfb6a6c4ceca7fc96828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7220590606af8fd2cce75eb84d720ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac1b64cb76717bd87cd068fbaf1cf6c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)若关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fdc09bc9e98f39d2019c114ee666b10.png)
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解题方法
3 . 已知函数
,且
.
(1)求函数
的解析式;
(2)用定义证明函数
在
上是增函数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c35fc4a430ac9cc0cc23a051d915c70a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed670b1f668778c6243f3f7470ee7d2.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)用定义证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cbdf18d833a156104a3beb25fc8a76a.png)
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4 . 已知函数
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6735e8606b9daa6c837601a6e13436.png)
(1)求
的解析式;
(2)设函数
,若方程
有
个不相等的实数解
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4198ff91032cc5fd1dced1c32a9acef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6735e8606b9daa6c837601a6e13436.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df08c7e96609ab0478c1c62650a87c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adabc767a9d3689906910ed308438870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ccd22fd0ca1a8e1468329284f91b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d659d2026196c3b191a645df902ed0.png)
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2024-03-07更新
|
173次组卷
|
2卷引用:浙江省丽水市2023-2024学年高一上学期1月期末教学质量监控数学试题
名校
5 . 已知函数
满足
,有
.
(1)求
的解析式;
(2)若
,函数
,且
,
,使
,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab7ca79164d6a6e6834425f428c2bb29.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8befb6ffb9a4d955482b94ad9c7154f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4dfad781aa9407473ea3c0980e6905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab438a14d6afa5d8b4472f71d562bdd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc9bbe373e92375f4aba21b828c9439.png)
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2024-03-01更新
|
284次组卷
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2卷引用:河南省三门峡市五县市2023-2024学年高一上学期1期末调研考试数学试题
名校
解题方法
6 . 已知定义在R上的函数
,满足
.
(1)求
的解析式;
(2)若点
在
图像上自由运动,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637324fbc5e920b736205245a7f1b803.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684eae051519f6aba934423a7182fa0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afb80007983e5b99dcdeebf87d18ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e96de63df48728b1773f8557f4476ca.png)
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2024-03-01更新
|
394次组卷
|
2卷引用:河南省南阳市2023-2024学年高一上学期期终质量评估数学试题
7 . 已知函数
满足
,函数
.
(1)求函数
的解析式;
(2)若不等式
在
上恒成立,求实数
的取值范围;
(3)若关于
的方程
有四个不同的实数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d45717d939afd817d3378ef356d29aa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab409bb25958c2f01c73e26042c6f51e.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a9ee90f86f252dd48868d94f4c564a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f1279d1afe86edd9a61fde66cbec01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025efb915cc19078215ecbd4776b7f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
8 . 已知函数
且
的图象过坐标原点.
(1)求
的值;
(2)设
在区间
上的最大值为
,最小值为
,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64b4b710dc0a772a414648561c22f8f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fa1476cf3552b9ae91ef039b1c6c80.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0210752443180e7c55c9c91e7688b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2024-02-29更新
|
360次组卷
|
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
解题方法
9 . 某地区不同身高
未成年男性体重平均值
如下表:
根据表中数据及散点图,为了能近似地反映该地区未成年男性平均体重
与身高
的关系,现有以下三种模型提供选择:
①
,②
,③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d586e481f28d2b5f11c0c2cf58e24b95.png)
(1)你认为最符合实际的函数模型是哪个(说明理由)?并利用
,
,
这三组数据求出此函数模型的解析式;
(2)若某男性体重超过同一地区相同身高男性体重平均值的1.2倍为偏胖,低于0.8倍为偏瘦,那么该地区一名身高为164cm,体重为62kg的未成年男性的体重是否正常?
(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3646f7feb3fb24f06a7fb9aaace7de39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d8666511ef2608449cd263a43e9de6.png)
身高![]() | 80 | 90 | 100 | 110 | 120 | 130 | 140 | 150 | 160 | 170 |
体重![]() | 10 | 12 | 15 | 17 | 20 | 27 | 31 | 45 | 50 | 67 |
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/2d149b9c-de05-4cef-a854-2b7d470b1bb5.png?resizew=262)
根据表中数据及散点图,为了能近似地反映该地区未成年男性平均体重
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d8666511ef2608449cd263a43e9de6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3646f7feb3fb24f06a7fb9aaace7de39.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57afc9dd83b97ff76bc579430e04f0b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22857eeac1cfa95e3126709258acb4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d586e481f28d2b5f11c0c2cf58e24b95.png)
(1)你认为最符合实际的函数模型是哪个(说明理由)?并利用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e3f33cf7712f9e994a06f78290e88d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619076ee236dbe057032043650b9b7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5106a28d4934cd3f4a247daea98d2b9b.png)
(2)若某男性体重超过同一地区相同身高男性体重平均值的1.2倍为偏胖,低于0.8倍为偏瘦,那么该地区一名身高为164cm,体重为62kg的未成年男性的体重是否正常?
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea2a08c90939cf017d113b5b38405fa.png)
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解题方法
10 . 已知函数
的图象过原点,且无限接近直线
但又不与该直线相交,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c40e684b2d695f9cde81034a1f97e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
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