名校
1 . 已知
,当
时,
恒成立,则a的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308ec837834aed4b37d94e4f3debe4e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac86da5eaf856b92c5e65677123d84a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ddfaa647cb7f12e305e802eac9451bd.png)
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2 . 已知不等式:
;;
(1)设不等式的解集是M,如果
,求实数a的取值范围;
(2)若实数
,对任意实数
恒成立,求实数a的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/716a016e3b774790889fefc989bd6dbc.png)
(1)设不等式的解集是M,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08048db0a4115538251553b85da3ddfb.png)
(2)若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eac2b31a19918895e5af2d316490e7.png)
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2020-01-31更新
|
104次组卷
|
2卷引用:上海市上海外国语大学附属外国语学校2017-2018学年高一上学期10月月考数学试题
真题
名校
3 . 已知有穷数列
共有
项
,首项
,设该数列的前
项和为
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32cf4e7bc98490a799fb945ff79f3175.png)
其中常数
.
(1)求证:数列
是等比数列
(2)若
,数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0fdd5689aea0f85229e6c3192e24b49.png)
,求出数列
的通项公式
(3)若(2)中的数列
满足不等式
,求出
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5631bc01b998a4b3fabd9e131699dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f695648b65935f0e2d4157c49d1fe86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32cf4e7bc98490a799fb945ff79f3175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b92069f3715f3d341a6db003cce166b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8efebb53e5a6bb692f1c87c57f8462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0fdd5689aea0f85229e6c3192e24b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464b893572d5ed71a0ca48f461e2536a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)若(2)中的数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e9d2d695533cf514d0cbe937204ebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2020-01-09更新
|
595次组卷
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3卷引用:上海市延安中学2017-2018学年高三上学期期中数学试题
名校
4 . 不等式
对一切
都成立,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2092237b7af8dff55bc07d58ef7157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-05-19更新
|
640次组卷
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6卷引用:上海市新中高级中学2023-2024学年高一上学期期中数学试题
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5 . 不等式
对任意
恒成立,则实数
的最大值为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108e691cdc37d6b3f97403f66e43da27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca97e3aa8061c4d8e621c5598c69b13b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
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6 . 若对任意
,不等式
恒成立,则实数
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1a51724103ff1e3efa476e6c951ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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7 . 已知函数
;
(1)若不等式
的解集为
,求
的值;
(2)在(1)的条件下,对任意的
,都有
,求
的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f13348c5046ab737279ed5776a93efab.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef6f4cf539a232bc766768a9bc257b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7e88b74f492f89e21e4cf65353bdb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)在(1)的条件下,对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/974dfe3e72d5f88f7176eee3f2db58d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2020-03-03更新
|
50次组卷
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2卷引用:上海市建平中学2017届高三上学期期中数学试题
名校
8 . 当实数x、y满足
时,
的取值大小与x、y均无关,则实数a的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a98e6c0aa227fcfc0c7b609cea97fc6.png)
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2019-11-07更新
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117次组卷
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2卷引用:上海市上海中学2017-2018学年高二上学期期中数学试题
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9 . 已知函数
.
(1)若
,解不等式
;
(2)是否存在实数
,使不等式
对一切实数
恒成立?若存在,求出
的取值范围,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242b7095d2bea8f94d3a0366ded17f30.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be1d8c6384d7fabddb693b2b7fcdf4a.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3cdff8dbc573b88a9ce6225ab287e94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2019-10-21更新
|
194次组卷
|
3卷引用:上海市上海中学2017-2018学年高一上学期期中数学试题
名校
10 . 若关于
的不等式
上的解集为
,则实数
的取值范围是________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901a04625a1eaa48f4d4ac671d233a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a837165ca03f9e4ea8964979c95e3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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