12-13高一上·浙江杭州·期末
名校
1 . 设函数
,对任意
,
恒成立,则实数
的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f496911266e86ff15d128b01657838cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f2839e3f767d6c4923a301c957cedc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76632cd3bd2cdcc0949711831287b51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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名校
2 . 设
是按先后顺序排列的一列向量,若
.且
,则其中模最小的一个向量的序号![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47434a2b31608f9b21737bc20ab8b8fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/471ab7b3589993da7e5ad3a049facd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db1b986a0bfaa94abae1a19da1d56dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
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2019-11-30更新
|
185次组卷
|
2卷引用:上海市奉贤中学2018-2019学年高二上学期10月月考数学试题
名校
3 . 若函数
,
,记函数
的最小值为
注:
表示含有字母a,b的代数式
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b718542524f8a615a1b1e53f8086eec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dcdd98159ea28f0be60a7693491fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8d10d3ac829c890dd21c9fbf79cf7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2720116152a21e0e345f0d2a419a8fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8506dd80fd574df5e29d55fcb9280482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06c07261d97255c5c1017a3a700d29ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8506dd80fd574df5e29d55fcb9280482.png)
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2019-11-07更新
|
172次组卷
|
3卷引用:上海市奉贤区2018-2019学年高三上学期期中(14校联考)数学试题
名校
4 . 已知
,
,
,
,且
,则
的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881e7b6e25cc9b55004a7419adf234cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07293a24cf2d403f59aa43aaacb8e236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49a4c11d41372175ba3541a44c3376b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b2613017de2e76bf8dd10295de827ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131ac7eb1e911c9a40e84235bf3742ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1d44e0603df1928f1b54a342e1dd3f7.png)
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5 . 已知向量序列:
,
,
,
,
满足如下条件:
,
,
,且
,则
,
,
,
,
,
中第______ 项最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b6ac3802ee31cb30600b61beb3e827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf785aa19bb8f014ec8b396877c2284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/160cd51b13868fa1dfa7de3259e0be3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5a3207c12d8d2c4ca27f4c2c9d477b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d798c1341fe1103764d2103d907610b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8adf2a0124915290c07c22223ec9b9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d1fe6ca98028fea852f90fdefb13ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26023f0ae3c5310e683aa684e93b1063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833b7c77513e95375a6a4bc0df98767e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e43dc4071bf28f09e8a5c8297f1ae885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92cad1571c3bad0bbc33e7e314f82dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8bb5792fbff9fee03d0d63f48b6c96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
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13-14高二下·上海·期中
名校
6 . 在直三棱柱
中,底面ABC为直角三角形,
,
. 已知G与E分别为
和
的中点,D与F分别为线段
和
上的动点(不包括端点). 若
,则线段
的长度的最小值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a9ad711b25c36dae0c2a2cedff9954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8bd8c13192ca45c16dad5d59b547220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af2626608f61a4cfbb86494bd6df0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781ed91456e62d6319dc8671e48a7332.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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2016-12-03更新
|
2450次组卷
|
5卷引用:2013-2014学年上海市交通大学附属中学高二下学期期中数学试卷
(已下线)2013-2014学年上海市交通大学附属中学高二下学期期中数学试卷(已下线)2013-2014学年上海交大附中高二下学期期中数学试卷2015-2016学年湖南衡阳八中高二上第二次月考理科数学卷吉林省吉化第一高级中学校2020-2021学年高二11月月考数学(理)试题陕西省西安中学2021-2022学年高二上学期期中理科数学试题
名校
7 . 设实数a,x,y,满足
则xy的取值范围是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e8daa0aafc269834a1aa645b2789e2.png)
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2016-12-03更新
|
625次组卷
|
4卷引用:上海外国语大学附属外国语学校2022-2023学年高一上学期期中数学试题
上海外国语大学附属外国语学校2022-2023学年高一上学期期中数学试题2015届江苏省宿迁市重点中学高三下学期期初开学联考理科数学试卷2015届江苏省宿迁市重点中学高三下学期期初开学联考文科数学试卷(已下线)2015届江苏省宿迁市重点中学高三下学期期初开学联考理科数学试卷
2010·上海虹口·二模
8 . 一组数据为
,10,11,9,这组数据平均数为10,则方差的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
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名校
9 . 已知实数
满足
,求
的值域________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96763da0e13e1c1da878913498498b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ebc856291255f2d4a6c20b982a2442.png)
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14-15高三上·上海浦东新·期末
10 . 函数
,若
恒成立的充分条件是
,则实数
的取值范围是 .
![](https://img.xkw.com/dksih/QBM/2014/6/24/1571796334575616/1571796340162560/STEM/710cec5402054893abb1019bf78fbf94.png?resizew=122)
![](https://img.xkw.com/dksih/QBM/2014/6/24/1571796334575616/1571796340162560/STEM/22dd53d1c5e84b45ae481bd1df955cfc.png?resizew=87)
![](https://img.xkw.com/dksih/QBM/2014/6/24/1571796334575616/1571796340162560/STEM/c372fc361c1442bcb74bb62fc152ec3f.png?resizew=57)
![](https://img.xkw.com/dksih/QBM/2014/6/24/1571796334575616/1571796340162560/STEM/0aecd82a7f4e4e749b287b500059c6e7.png?resizew=13)
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