1 . 已知实数
满足
,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab29a62fddb4f24032ebce5598b9cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fc838e1477179b36ca7481ee2cc1e8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 对于函数
定义域中任意的
有如下结论:
①
;
②
;
③
;
④
;
当
时,上述结论中正确的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9f58d4591d668b4bc32fae4faab8298.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7708640b13e4a01faeaf9e33b50d4a9b.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e9b0e8693d64d9a59287e4802c535a.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/717a1efcded39ade5c5e98eeb21013e4.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60025fe6bbfd7645844c9e3e7a5871e6.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae38cfa3259536009ae02d160450704.png)
A.①③ | B.②③ | C.②④ | D.②③④ |
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解题方法
3 . 设
满足约束条件
,则
的最大值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e2606d543b8cf8d0ee545cdea30afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4489516aca67a6afe53fac2f1477f76.png)
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解题方法
4 . 若集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41284ac206498252bc150ca812f6a0aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/191583ba283c579c5bfdc8f512f1ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知
满足线性约束条件
,若
的最大值为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0924f6bc9c5445b3c048f81f99bf21c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35859c60d83e81747b44806950be1aab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
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6 . 已知三棱锥
中三组相对的棱长分别相等,长度分别为
,
,
,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34c590f48c84fe471d1af522c343c59.png)
,则三棱锥
的外接球的表面积的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc2ef8de7a4765a4f8780c1b5c3f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/703d9e332043adad2cecd70a07093262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da001dad7941e6c9858637d7b62cec59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34c590f48c84fe471d1af522c343c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7dbc702617c765a573961953cc0901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-02-26更新
|
140次组卷
|
2卷引用:中原名校2022年高三上学期第四次精英联赛理科数学试题
解题方法
7 . 信息熵是信息论中的一个重要概念.设随机变量X所有可能的取值为1,2,
,n,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da467b6613d9d20676bc9bddbe6f5ca.png)
,
,定义X的信息熵
,则下列判断中正确的是( )
①若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2c054f4510895b4c526fedbe3d4f64.png)
②若
,则
;
③若
,则当
时,
取得最大值
④若
,随机变量Y所有可能的取值为1,2,
,m,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7802794b6d58c5755eb4a471f270533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da467b6613d9d20676bc9bddbe6f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85719767bc8b764fcde16731c1ea45c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c94a17b49550283be4ec1a348c8534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae49e5608e5b61ac710f93955af5798e.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba47fb63d946d478fcc51769657eeada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2c054f4510895b4c526fedbe3d4f64.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7947b04dfd9793eefe588ae1696f32eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e5f84b0617cbfa27da74b62ef8aae4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5790d5181783c15fd46d95bf18b796f0.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b21c7729887167e605d912861339bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5baa3c2e56ea2aca943b9b2a5b938b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7802794b6d58c5755eb4a471f270533.png)
A.①② | B.②③ | C.①②④ | D.①②③④ |
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8 . 若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39183377080aef67d2b4b93fcf8d2abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f87c0a0763e6054405ff5114759b432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462be810ae5e44f20f1d085bfacad78b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
9 . 已知
是各项均为正实数的数列
的前
项和,
,
,若
,则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676a4bca222a1d166aaddbc1a1d7adb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff12f87f1bb760ad079bf751b0fe2af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
10 . 已知实数
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74c19e5e0b1b567751a43b5edfe0668.png)
,则
的最小值是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74c19e5e0b1b567751a43b5edfe0668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fc838e1477179b36ca7481ee2cc1e8.png)
您最近一年使用:0次