已知函数
.
(1)求不等式
的解集;
(2)若函数
最小值为m,已知
,
,
,
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc81b9154607309b37218fff7d02806.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4509817be39bef4bcde115996ee39e8.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5215c4c16f48ab5706fe4c760cc588d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0fde4f8aa8e36636dd397384a1fe8da.png)
2022·黑龙江·一模 查看更多[4]
三省三校(黑龙江哈师大附中、东北师大附中、辽宁实验中学)2022届高三下学期第一次模拟数学(理)试题三省三校(黑龙江哈师大附中、东北师大附中、辽宁实验中学)2022届高三下学期第一次模拟数学(文)试题福建省南平市浦城县第三中学2023届高三上学期数学期中测试模拟卷试题(3)(已下线)三省三校2022届高三下学期第一次模拟数学(理)试题变式题21-23
更新时间:2022-03-07 11:07:32
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适中
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解题方法
【推荐1】设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10538e95c9c27f22c55c8f48fbf05d20.png)
,
.
(1)当
时,求不等式
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(2)证明:
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(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d86b4ad722d7b720603eba9d330fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e312eca38032174f9739126b81d012.png)
(2)证明:
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【推荐2】设
.
(1)当a=2时,求不等式
的解集;
(2)若a>0,b>0,c>0且ab+bc+ac=1,求证:当x
R时,f(x)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/339393e96f196c1d26fb0ab7738a68a1.png)
(1)当a=2时,求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e799e937076aa5a7dcd51cdc0f40f6b0.png)
(2)若a>0,b>0,c>0且ab+bc+ac=1,求证:当x
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774c7cfdc6243117f571a88b997e4b8.png)
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【推荐1】设函数
.
(1)当
时,求不等式
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(2)若
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8e6f5cd656bfee77716104dc7ef00a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d4e9b5e2013602a77d646a2c181e67.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b26d2fe18b7687c7ffa9d8b673e61c4.png)
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您最近一年使用:0次
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【推荐2】设
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(1)求
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524cbf18b4530044fd3c500c3bf4ef59.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5300590ff3ed47179909171816b56fc6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3034b012249435ee3f216544a9ab398d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd61aa19d78b0180ef1355aba98c476.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
解题方法
【推荐3】已知函数
.
(1)解不等式
;
(2)设
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、
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14cbb08b53404d13f5af98a5d269b33.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f86f46d0daaf4b9aa3b8f9c844d674db.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3720d6790620367b1d1b2883bc78f4dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ac49619543ace1f24754240fcf6cb09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae24688d4c45aad43e9af0b7bbfda6b.png)
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适中
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解题方法
【推荐1】已知
,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7882cf31fde25d80692a9397a5e810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bba4af78fb5091128f398ec67828de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99841c62722521fba6301d17965c6adf.png)
您最近一年使用:0次
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适中
(0.65)
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【推荐2】已知函数
.
(1)当
时,求不等式
的解集;
(2)若
(a,b,c均为正实数)的最小值为3,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c60fb92ead3858d0aa664de7d6b5bc.png)
(1)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85579405bc345b4e93391e9209a7d47a.png)
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd4067a19eeb07474557fe7b2508880.png)
您最近一年使用:0次