名校
1 . 给出如下四个命题:
①若
,则
;
②若
,则
;
③不等式
的解集是
;
④若
,且
,则
.
其中正确命题的序号为___________ (写出所有正确命题的序号).
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f05930837039d924f84f12ec886733d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb54b1b3617ebc502cb44194cbcd1dc.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca24341509c05e672999202f2df0ebaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f7c54faca6eac8af5309942062058d.png)
③不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0b7345527910e03453d8657b2efbb02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746f35ff3b1361027c4bce1361c88b68.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf9befc3b336d83b83bcfcbc19c0752.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb524c1ed61704756d3af60e00be213.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d6559aa21f40e5c20d4373023760809.png)
其中正确命题的序号为
您最近一年使用:0次
2021-10-22更新
|
642次组卷
|
3卷引用:北京四中2021-2022学年高一10月月考数学试题
名校
解题方法
2 . 有下列命题:
①不等式
的解集为
;
②对于实数
,
,
,若
,则
;
③对于实数
,
,
,若
,则
;
④若
,函数
的最小值是
;
⑤当
时,不等式
恒成立,则
的取值范围
;
其中真命题的序号为__ .
(把所有正确答案的序号填写在横线上)
①不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d5d21732d8a22de752d615b46867f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee57417245352ff37564703524651589.png)
②对于实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c22b9d08cf536bbb76bce1b0f135772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
③对于实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5842f47b99932df68efbb64eb847e956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411100df59e7a9dc8d4ad77d497b6fa9.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/647e17f9be50dcaba45fa6b15d5d982a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
⑤当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e38f9e9352a21f83b2c1e8f15f95593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1a65d88f9823d49da8f3b96ea9ec6f.png)
其中真命题的序号为
(把所有正确答案的序号填写在横线上)
您最近一年使用:0次
名校
3 . 下列说法正确的序号为( )
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() ![]() |
您最近一年使用:0次
2022-01-16更新
|
653次组卷
|
6卷引用:黑龙江省五校(嫩江市第一中学,嫩江市职业高中,黑河七中,伊拉哈中学,海江中学)2021-2022学年高一上学期期末联考数学试题
名校
4 . 下列说法正确的序号为( )
①若
,则
;
②若
,则
;
③若a>b,c>d,则
;
④若
,c<0,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288420f0b137ec90d963e6b5db65fe30.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67a44d971fdc197191b4a7c2b3716e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f7c54faca6eac8af5309942062058d.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa8950fa963eedb948d6a57871478cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/125415eb6733489cdc96ee48eb88aee7.png)
③若a>b,c>d,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f50ce6b511e6b928796e048fc7fa5c.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288420f0b137ec90d963e6b5db65fe30.png)
A.①② | B.②③ | C.①④ | D.③④ |
您最近一年使用:0次
解题方法
5 . 给出下列四个命题:
①若
,则
;
②当
时,
的最小值为4;
③已知
是等差数列
的前
项和,若
,则
;
④过抛物线
焦点
的直线交抛物线于
两点,则
.
其中正确命题的序号为___________ .
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed0d3e6741e0193addff8cf7b25019c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68265211ff8205d5c0ea1b5f7e20521.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/409d37d9465ec42be99d13cfbc0bc6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ced225ea5590e06ece27b77ad3ac74.png)
③已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6745b23f90d2e3a2bad6048bc734bb08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47af0fa1a8a597e0d1336a5368f47084.png)
④过抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf7b911d5ec34e3ffc72b89285592ff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b6a742dbacdab5aaa298007663dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a415f13ef220884d1916203ed4e542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669b5240185e8caf113d2b5fb6a453ae.png)
其中正确命题的序号为
您最近一年使用:0次
名校
6 . 已知a>0,b>0,a+b>2,有下列4个结论:①ab>1;②a2+b2>2;③
和
中至少有一个数小于1;④
和
中至少有一个小于2,其中,全部正确结论的序号为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c70fcaa661df4fbcad820b439accda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9237dbe3a4f28962ef2870b4e7dab599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb82093f9c1ec3ee4218ae8f8377644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165b2250624fc1f1551d6c38991487d6.png)
您最近一年使用:0次
2020-10-27更新
|
965次组卷
|
7卷引用:北京市清华大学附属中学2020-2021学年高一10月考数学试题
北京市清华大学附属中学2020-2021学年高一10月考数学试题湖北省黄石市第二中学2020-2021学年高一上学期11月统测数学试题山东省青岛市市北区青岛第十六中学2020-2021学年高一上学期第一学段模块检测数学试题(已下线)2.2.2 间接证明(重点练)-2020-2021学年高二数学(理)十分钟同步课堂专练(人教A版选修2-2)(已下线)2.2.2 间接证明(重点练)-2020-2021学年高二数学(文)十分钟同步课堂专练(人教A版选修1-2)陕西省咸阳市武功县普集高中2021-2022学年高二下学期第一次月考理科数学试题(已下线)3.2 基本不等式(1)-【帮课堂】(苏教版2019必修第一册)
名校
7 . 给出以下几个结论:
①若
,
,则
;
②如果
且
都不为
,则
,
;
③若
,
是夹角为
的两个单位向量,则
,
的夹角为
;
④在
中,三内角
所对的边分别为
,则
;
其中正确结论的序号为______ .
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75807858b7804a1ad2039c41f323a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90882db1028f1e2440339d203c1901e6.png)
②如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6893511ebfd1fac1412774e04e10748d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44bc5f0ef5e9129e22310d5ea17cf1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d5600adbf8003f263ae7baf49c05071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2868a9fe011f56a80c9d1a8ee4604d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fe4e713c108e118522a99ecd683924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0942b32552d016471809659af20ac97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c7e86192bb666b3fb41b3694e79d53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
④在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be845b564ed27a6093a44e5be491601.png)
其中正确结论的序号为
您最近一年使用:0次
2020-05-15更新
|
407次组卷
|
2卷引用:四川省眉山市2018-2019学年高一下学期期末数学试题
8 . 已知a,b∈R,有以下命题:
①若a>b,则ac2>bc2;
②若ac2>bc2,则a>b;
③若a>b,则a•2c>b•2c.
则正确命题序号为_____ .
①若a>b,则ac2>bc2;
②若ac2>bc2,则a>b;
③若a>b,则a•2c>b•2c.
则正确命题序号为
您最近一年使用:0次
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解题方法
9 . 下列说法中,错误 的有______ (写出你认为错误的所有说法的序号)
①若
,
均为正数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca073cbcb823c28d3434100b59f57c38.png)
②若
,则
的最小值为2
③
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32df2a9a0d6b9d8fcbe19dfd032479b.png)
④若
,则
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca073cbcb823c28d3434100b59f57c38.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4138f6987cd2ee9e56b2ac80e84f9e24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabea58a47278399e927f81bb8abc218.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32df2a9a0d6b9d8fcbe19dfd032479b.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a6f362a7f8f972d6b329a882e940d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e65acecaaa3d94827cd07109ada4e18.png)
您最近一年使用:0次
2020-08-14更新
|
615次组卷
|
5卷引用:四川省成都市2019-2020学年高一下学期期末(文科)数学试题
解题方法
10 . 判断正误(正确的填“正确”,错误的填“错误”)
(1)对任意
,
均成立.( )
(2)若
,则
.( )
(3)
异号时,
.( )
(4)当
时,
的最小值为2.( )
(1)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bcce6eb3b38322059b6051ce600ee8b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dfa55731858aaed472d94ba55af2cc4.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37006891004d02050e7c57db20af3981.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27f27cbb8185c1974d715ff95f8801c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13f40c24c64bbb0645fcf585f4e66872.png)
您最近一年使用:0次