解题方法
1 . 已知a、b均为正数,设
.
(1)当
时,求不等式
的解集;
(2)若
的最小值为6,求
的值,并求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c77137f24451d1899bed097920b4c75.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48adb8a59b5c02fad5eada1b35171cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6009d51b897a4f898b57e483234f391a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7266b2ef457b8ddeee3fa2cc24022e.png)
您最近一年使用:0次
名校
2 . 对于无穷数列
,设集合
,若
为有限集,则称
为“
数列”.
(1)已知数列
满足
,
,判断
是否为“
数列”,并说明理由;
(2)已知
,数列
满足
,若
为“
数列”,求首项
的值;
(3)已知
,若
为“
数列”,试求实数
的取值集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850e32f9ea92c6434097f959ac218939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580c7507deb9d75d6e12c5c733a50cce.png)
(1)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15da161c85546d3b84e777cd467cec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580c7507deb9d75d6e12c5c733a50cce.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2ee5cbe9d52bac24967a344604eb2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb30a3a05dcd974fb51ee94c662a3ac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580c7507deb9d75d6e12c5c733a50cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94634fe2a19a7642c30f0ed2b4d48338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580c7507deb9d75d6e12c5c733a50cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2023-02-15更新
|
423次组卷
|
3卷引用:河南省中原名校2024届高三下学期高考考前全真模拟考试数学试题
名校
3 . 已知函数
.
(1)若对任意的
,恒有
成立,求实数a的取值范围;
(2)设
,且
,
时函数
的最小值为3,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0deb62a28e951c283dba601c8532c53b.png)
(1)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1027f09cfa512ed47b9e4773f0e5f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbc901cbdb68130ddac3174583dd93c.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a2dd32ee3f7c8ce211d4cd9ccc3f22.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/7d02059613da3797ae406925b6ee5b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e21c1056fc43b25c11ed3a4a7938f7a.png)
您最近一年使用:0次
2019-12-11更新
|
224次组卷
|
2卷引用:河南省周口市川汇区周口恒大中学2024届高三上学期期末数学试题