名校
解题方法
1 . 对下列命题:
(1)
的最小值为4;
(2)若
是各项均为正数的等比数列,则
是等差数列;
(3)已知
的三个内角
所对的边分别为
,
,
,且最大边长为
,若
,则
一定是锐角三角形;
其中所有正确命题的序号为_________ (填出所有正确命题的序号).
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24539bf655f0693621fdf36098346de2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc71a2fd8c6b263feea5ff5d6a36121.png)
(3)已知
![](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/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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95563a79e3b68c597ae1e5167516ff88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
其中所有正确命题的序号为
您最近一年使用:0次
名校
2 . 如图,在棱长为
的正方体
中,
,
分别为
,
的中点,有以下四种说法:
![](https://img.xkw.com/dksih/QBM/2022/4/14/2958049529307136/2958818150686720/STEM/a716e0ce-ac0f-4111-ba4c-8aacf0d4c6d3.png?resizew=170)
①直线
与
的夹角为
;
②二面角
的正切值是
;
③经过三点
,
,
截正方体的截面是等腰梯形;
④点
到平面
的距离为
;
则正确命题的序号为_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2022/4/14/2958049529307136/2958818150686720/STEM/a716e0ce-ac0f-4111-ba4c-8aacf0d4c6d3.png?resizew=170)
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
②二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213d25b5ade550ec6afd3536e9eb5d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
③经过三点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
④点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
则正确命题的序号为
您最近一年使用:0次
2022-04-15更新
|
340次组卷
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2卷引用:四川省攀枝花市第七高级中学校2021-2022学年高三上学期入学考试理科数学试题
名校
3 . 给出以下命题:
(1)已知回归直线方程为
,样本点的中心为
,则
;
(2)已知
,
与
的夹角为钝角,则
是
的充要条件;
(3)函数
图象关于点
对称且在
上单调递增;
(4)命题“存在
”的否定是“对于任意
”;
(5)设函数
,若函数
恰有三个零点,则实数m的取值范围为
.
其中不正确 的命题序号为______________ .
(1)已知回归直线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25df027f2bdf65a1ffdd03fc2608377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92418f910b93502041350259b221ea34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb65513075a26d16bb69f2ed550c0791.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5112cbffb04be482ca0b09bdb9b5df35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ba49b31a5afc390ac8835fe5ebbb66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(3)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a1d1d16dc32dfbe9bb9154e97664341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c16c64869cf25374d05b130415a5013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e10dc60362ba61cd036365eb4d2caa.png)
(4)命题“存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25e2acc37cf685dbd258ef9cffd40a3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffa64caceb1a517814c8756c0246bc8.png)
(5)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ae58ac8693a7f5f7570b6cbdb5c07c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e409849c921f4868c5a78abffb9f74bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27cf818dd484cc4cebd40a5f28eb8e9f.png)
其中
您最近一年使用:0次
2020-07-11更新
|
446次组卷
|
5卷引用:四川省成都市第十二中学(川大附中)2021届高三第二次模拟数学试题
四川省成都市第十二中学(川大附中)2021届高三第二次模拟数学试题云南省红河州2019届高三复习统一检测数学(文)试题(已下线)第一单元 集合与常用逻辑用语(A卷 基础过关检测)-2021年高考数学(文)一轮复习单元滚动双测卷云南省红河州2019届高三高考数学(文科)模拟试题(已下线)课时04 命题的形式及等价关系-2022年高考数学一轮复习小题多维练(上海专用)
名校
解题方法
4 . 下列说法中正确的序号为___________ .
①在同一坐标系中,函数
与函数
的图象关于
轴对称;
②函数
(
且
)的图象经过定点
;
③函数
的单减区间为
;
④任意
,都有
.
①在同一坐标系中,函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b161347f6a2fcfd9bf0acf1e8a03fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/463d84a4fbb7d0e1ca72911e70c4bacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa80ae0b0eab1f14cccf872500f0843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa482d7bcaa385bfc3548b42a4bfb60.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c34af900e0f2a076c26a5273d4f75b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95169f7287a6a0c9b6917eb2ceb245eb.png)
④任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20251bc82067179f013288b5c338856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f487f165f3ecce50cca5e3720c0891c.png)
您最近一年使用:0次
2021-11-21更新
|
724次组卷
|
2卷引用:四川省成都市四川大学附属中学2021-2022学年高一上学期期中考试数学试题
5 . 某部门为了解某平台“直播带货”商品销售反馈情况,随机抽取了
这8类商品,收集了这几类商品分别在新规实施前后的消费者评价得分,绘制成如图所示的雷达图.根据统计图判断,下面的叙述一定不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/0d0cbfe1-2555-4e38-9090-bd7477053f1b.png?resizew=227)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/656a5e0c1af51bf5a1d0f60ae93ba683.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/0d0cbfe1-2555-4e38-9090-bd7477053f1b.png?resizew=227)
A.新规实施后,![]() |
B.新规实施后,![]() |
C.这![]() |
D.有![]() |
您最近一年使用:0次
名校
6 . 等差数列
的前
项和为
,若
,公差
,有以下结论:
①若
,则必有
; ②若
,
,则
;
③若
,则必有
; ④若
,则必有
.
其中所有正确结论的序号为______ .
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63911d261ebb75e0ab8f76b58cbb7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e93339c2793d3d8add8cd5770d20fb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6c2e49c873187b12e90a7b4d5d906b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b043acaf51edc23e735492fa61e66f4.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea31d9dcfd7fba1b7c90d4c349525ed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe9f984aaa409de0dde80189cda4d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d77bb6b1a5ca128223c897cf09ba19d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9a959dda5985723ef15d5d31ea6a25.png)
其中所有正确结论的序号为
您最近一年使用:0次
2021-08-03更新
|
624次组卷
|
3卷引用:四川省资阳市2020-2021学年高一下学期期末数学试题
名校
7 . 对于曲线C:
,给出下面四个命题:
①曲线C不可能表示椭圆;
②当1<k<4时,曲线C表示椭圆;
③若曲线C表示双曲线,则k< 1或k> 4;
④若曲线C表示焦点在x轴上的椭圆,则
,其中所有正确命题的序号为 _________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f5d8320cca3ff218e4ca903df259c4.png)
①曲线C不可能表示椭圆;
②当1<k<4时,曲线C表示椭圆;
③若曲线C表示双曲线,则k< 1或k> 4;
④若曲线C表示焦点在x轴上的椭圆,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0c195ebd4c1f74ca5498a46fc9750c.png)
您最近一年使用:0次
2021-11-21更新
|
822次组卷
|
5卷引用:四川省攀枝花市第三高级中学校2021-2022学年高二上学期第一次月考数学(文)试题
8 . 如图,在正方体
中,
、
、
分别为线段
、
、
的中点,下述四个结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/380cf2d1-93a8-4d36-be72-3fe8d216bfe1.png?resizew=179)
①直线
、
、
共点;
②直线
、
为异面直线;
③四面体
的体积为
;
④线段
上存在一点
使得直线
平面
.
其中所有正确结论的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/380cf2d1-93a8-4d36-be72-3fe8d216bfe1.png?resizew=179)
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ad8115387158c8dda205d26968ba11.png)
③四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
④线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae39b47a4da24a0647620f09fd0029c0.png)
其中所有正确结论的序号为( )
A.① | B.①② | C.①③ | D.①②③ |
您最近一年使用:0次
9 . 如图,在棱长为1的正方体
中,
、
、
分别为线段
、
、
的中点,下述四个结论:
、
、
共点;
②直线
、
为异面直线;
③四面体
的体积为
;
④线段
上存在一点
使得直线
平面
.
其中所有正确结论的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ad8115387158c8dda205d26968ba11.png)
③四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
④线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae39b47a4da24a0647620f09fd0029c0.png)
其中所有正确结论的序号为
您最近一年使用:0次
2021-06-05更新
|
1616次组卷
|
4卷引用:四川省成都市第七中学2021届高三5月高考热身考试理科数学试题
四川省成都市第七中学2021届高三5月高考热身考试理科数学试题上海市浦东新区南汇中学2021-2022学年高二上学期10月月考数学试题(已下线)第23节 空间几何体的表面积与体积(已下线)第04讲线线、线面、面面平行的判定与性质(核心考点讲与练)(3)
10 . 给出下列命题:
①同时垂直于一条直线的两个平面互相平行﹔
②一条直线平行于一个平面,另一条直线与这个平面垂直,则这两条直线互相垂直;
③设
为平面,若
,则
;
④设
为平面,若
,则
.
其中所有正确命题的序号为_______________________ .
①同时垂直于一条直线的两个平面互相平行﹔
②一条直线平行于一个平面,另一条直线与这个平面垂直,则这两条直线互相垂直;
③设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba63ad02b1d5af2982fac3d91eb15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/750323bb31800fd98396e7d4027ef1f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35a45cfcdfbda18b089ce6698ccdbcd.png)
④设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba63ad02b1d5af2982fac3d91eb15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fd89e4d1b330f923f5dfae5073c4836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d1fa7bf93449d7619e46cef970dbf7a.png)
其中所有正确命题的序号为
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2021-01-14更新
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7卷引用:四川省资阳市2020-2021学年高三上学期第二次诊断性考试 数学(理)试题