名校
1 . 下列说法中错误的是__________ (填序号)
①命题“
,有
”的否定是“
”,有
”;
②已知
,
,
,则
的最小值为
;
③设
,命题“若
,则
”的否命题是真命题;
④已知
,
,若命题
为真命题,则
的取值范围是
.
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281b260fe94c42258b7fa8c6bc6cefa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9c2681fd202657c6d22201b738d19c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fdcb0d7eda2baefa352f1a01e6acbdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44d098a68a65c8c2b6c058cb17a903b.png)
②已知
![](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/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf35d6c316d9a014327ed3fdfeec374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a3df1ec9f4cc08c367980b39a931785.png)
③设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34715101c66fa12ce6baf0a9c53f1672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c988d709ba8cd8aed6cb83d76c0ba89c.png)
④已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b598308dce900e042d195d6fa0ab67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a6c2a598b6168200d5261996b8e3eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ba30151cfe5b33816cb59c11589e91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e93d6bae5b58d23fb85b8f54998da17.png)
您最近一年使用:0次
2018-02-07更新
|
2134次组卷
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5卷引用:2017届江西省师大附中、临川一中高三1月联考数学(理)试卷
名校
2 . 已知
,且满足
,那么
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20351f018c31f7018f5134f4526656fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b41db2966159287aa91293451c8e26f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a66132bba97ef7b81996862e9e377fd2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2018-01-23更新
|
489次组卷
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2卷引用:江西省赣州市寻乌中学2017-2018学年高二上学期期末考试数学(理)试题
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3 . 实数
满足
,则
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57372bf3c9375b898e93d922eb901a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2018-01-22更新
|
770次组卷
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2卷引用:江西省新余市第四中学2017-2018学年高二下学期开学考试数学(理)试题
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4 . 设
,若
是
与
的等比中项,则
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ef024c58becb626b823dfd3ee99c1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51bcbf60c1167941ec83c193382078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f008cea432b68934066d32243ccf69bf.png)
A.5 | B.6 | C.7 | D.8 |
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2018-01-21更新
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8卷引用:江西省上饶市“山江湖”协作体2019-2020学年高二上学期期中数学(自招班)试题
江西省上饶市“山江湖”协作体2019-2020学年高二上学期期中数学(自招班)试题辽宁省实验中学、大连八中、大连二十四中、鞍山一中、东北育才学校2017-2018学年高二上学期期末考试数学(文)试题福建省闽侯第四中学2017-2018学年高二上学期期末考试数学(文)试题陕西省黄陵中学2017-2018学年高二(重点班)下学期开学考试数学(文)试题湖南省娄底市双峰县第一中学、湘潭县一中2019-2020学年高二上学期9月月考数学试题湖南省益阳市2018-2019学年高二上学期期末数学(文)试题宁夏银川唐徕回民中学2019-2020学年高二12月数学(理)试题湖南省衡阳师范学院祁东附属中学2020-2021学年高二上学期期中(第二次月考)数学试题
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5 . 若
,且
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a9344f4fca7b9779ca7720e5277ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9482173f803db46ce48a5ae729498d7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
A.8 | B.14 | C.16 | D.64 |
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2017-11-24更新
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694次组卷
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2卷引用:江西省南昌市第二中学2018届高三上学期第五次月考数学(理)试题
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6 . 已知
,若
,则
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b5b9d0331d4d01d8cd84bcc275324d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6091e627266690b30e34c92acac72704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019d4ad2e3fb4a7abb66e0e9e55b556.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2017-10-30更新
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5卷引用:江西省南昌县莲塘一中2018届高三11月质量检测数学(文)试题
解题方法
7 . 若
满足
,且
都是正数,则
的最大值为 ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d708cb763716467219215cdc0782c0a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe9d5858af8444d292dcf5ae073c205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d708cb763716467219215cdc0782c0a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1cc0917ed8e9c109316b3369d31bfc0.png)
A.40 | B.10 | C.4 | D.2 |
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2017-10-14更新
|
915次组卷
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2卷引用:江西省横峰中学2017-2018学年高二上学期第一次月考数学(理)试题
解题方法
8 . 在
中,点
是
的三等分点(靠近点B),过点
的直线分别交直线
,
于不同两点
,若
,
均为正数,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/835e23011de53bb014c9468a25f96a07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27e62ba44cbfec6823ebc1f0c7457fb.png)
A.2 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
9 . 设函数
.
(1)若不等式
的解集为
,求
的值;
(2)若
,
,
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1fed8e13c83e9bcdbd259eab5f3c10a.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881fe2df23c5a0fe1d1fecbe9ffa55fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27c24244b1fdbf1455087c2ebf41c8b.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/ce460941cf3ff54ccb6aec5085689a91.png)
您最近一年使用:0次
2017-08-17更新
|
1031次组卷
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6卷引用:【校级联考】江西省重点中学余干中学、上饶县中学2018-2019学年高二上学期第一次联考数学(文)试题
名校
10 . 已知
且满足
,则
的最小值为_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8883e0b62e5ad6da5b62db0406916b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b0113fd4c7d157757571f9a009e02af.png)
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2017-07-14更新
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2卷引用:江西省宜春市奉新县第一中学2016-2017学年高一下学期期末考试数学(文)试题