名校
1 . 在数列
中,对任意正整数n都有
,且
,给出下列四个结论:
①对于任意的
,都有
;
②对于任意
,数列
不可能为常数列;
③若
,则数列
为严格增数列;
④若
,则当
时,
.
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/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56420139e57870e3d5fc9f4057c15f73.png)
①对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c967891f122c574963975c7bc2664fce.png)
②对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40af859d892e1c30f300678e4a05c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492b4cec252b0417cbec8e361718001d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0228078a7a3d05a7643f87e04992a304.png)
其中所有正确结论的序号为( )
A.②④ | B.③④ | C.①②③ | D.②③④ |
您最近一年使用:0次
2 . 对于变量“气压”的每一个值,变量“水的沸点”都有唯一确定的值与之对应.对于变量“油面宽度”,至少存在一个值,使得变量“储油量”的值与之对应的值不唯一.根据这两条信息,给出下列四个结论:
①水的沸点是气压的函数;②水的沸点不是气压的函数;
③储油量是油面宽度的函数;④储油量不是油面宽度的函数.
其中正确结论的序号为( )
①水的沸点是气压的函数;②水的沸点不是气压的函数;
③储油量是油面宽度的函数;④储油量不是油面宽度的函数.
其中正确结论的序号为( )
A.①④ | B.①③ | C.②④ | D.②③ |
您最近一年使用:0次
2022-11-10更新
|
220次组卷
|
4卷引用:陕西省多校2022-2023学年高一上学期第二次选科调考数学试题
3 . 函数
是区间I上的增函数,对区间I上任意两个不同的值
,
,记
,
,则下列四个结论中:①
;②
;③
;④
,所有正确结论的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047360990d25df5ce439f0b690193e30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37f91fc46133396bccbd045c2e717449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3cdc235fd6166dd6af08621f22e892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d2e76e447453c0afb0ac75f075a764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084732d2dd9a196d3e3b38ee8c9539b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012ec7894e87289affb10883553ab3de.png)
A.①② | B.①③ | C.②③ | D.②③④ |
您最近一年使用:0次
解题方法
4 . 已知函数
是偶函数,对任意
均有
,则下列正确结论的序号为( )
①
;②
是奇函数;③直线
是
图像的一条对称轴;④记
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d002f6523eb2b55e6c70b2b939c5caad.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17ee5f43412795671704ab0e8d0b2f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a61de40c2ca48ebd5ccf6cbc9be053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/224d30ca84f1aeeeda7a718e751a4925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a80ff303049425be87fc2ef0f309e8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18414e37f8007ed9aad25845e223949.png)
A.①②④ | B.①③④ | C.①④ | D.②③ |
您最近一年使用:0次
5 . 如图所示的菱形
中,
对角线
交于点
,将
沿
折到
位置,使平面
平面
.以下命题:
①
;
②平面
平面
;
③平面
平面
;
④三棱锥
体积为
.
其中正确命题序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4b6f03fa7c782408bb6fabb57c1576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ea25ef38e4afa8f75ffd0842890289.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe052786101dfcc941480919eb2cecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/70dc5fdb-9d52-4f09-87d1-32477e72c148.png?resizew=342)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c83a968964b21bd831d75905ca1e487.png)
②平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0cf578c7ba542ff9946ad172f896dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
③平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d138354c4e021ac8ae2a2fb176ca14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1530d93834fbafba5f7217778ea90442.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb4c6e9a723aa843e6ba62d7c1a3a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
其中正确命题序号为( )
A.①②③ | B.②③ | C.③④ | D.①②④ |
您最近一年使用:0次
2023-05-19更新
|
1254次组卷
|
6卷引用:陕西省咸阳市2023届高考模拟理科数学试题
陕西省咸阳市2023届高考模拟理科数学试题陕西省咸阳市2023届高考模拟文科数学试题山西省太原师范学院附属中学、太原市师苑中学校2022-2023学年高一下学期5月月考数学试题江西省南昌市铁路第一中学2023-2024学年高二上学期10月月考数学试题(已下线)第04讲 直线、平面垂直的判定与性质(五大题型)(讲义)(已下线)第一章 点线面位置关系 专题二 空间垂直关系的判定与证明 微点5 平面与平面垂直的判定与证明【基础版】
6 . 如图,正方体
中,E.F分别为棱
、
的中点,下列说法:
①直线BE与直线DF相交;
②直线BE与直线DF是异面直线;
③
;
④直线BD与直线EF是异面直线.其中正确的说法的序号为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/fd3e49a6-04c2-4f6f-8e6b-0775d2516008.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c01a135d225d2337622f978be143b64b.png)
①直线BE与直线DF相交;
②直线BE与直线DF是异面直线;
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275d0a87e481621d9aead27445adeefa.png)
④直线BD与直线EF是异面直线.其中正确的说法的序号为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/fd3e49a6-04c2-4f6f-8e6b-0775d2516008.png?resizew=169)
A.①③ | B.①④ | C.②③ | D.②④ |
您最近一年使用:0次
解题方法
7 . 在数学史上,为了三角计算的简便并且更加追求计算的精确性,曾经出现过下列两种三角函数:定义
为角
的正矢,记作
;定义
为角
的余矢,记作
.给出下列结论:
①函数
在
上单调递增;
②若
,则
;
③若
,则
的最小值为0;
④若
,则
的最小值为
.
其中所有正确结论的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b7b2ba487fb7e7063a4f95ea81c94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e98f5ac7415a262664dd6c2e8eacf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54bbf533362dbef1dae0345afae92f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f539be9908400df3c3e679e6b8e0e8.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb58e2e08a817e6279d9116012b0518.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc08b681e246016cd05802b234760e0.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb245aa9a36dc82042dead26f2de3400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06895303e65f0a987c429a83ff01235b.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812e2fd49b011c1af000001dea81ef99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc78b4b6a74d63b6d76496e80791e49b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb88b6e17cd00140b747b585a6644d39.png)
其中所有正确结论的序号为( )
A.①② | B.③④ | C.①③④ | D.②③④ |
您最近一年使用:0次
解题方法
8 . 给出下列5个命题:
①在等差数列
中,若
,其中m,n,p,q均为正整数,则一定有
.
②任意两个实数a,c的等比中项为
;
③若等比数列
的公比
,则其前n项和
;
④数列
的通项公式是
,且
,则
.
⑤等差数列
中,前n项和
,有最小值,则公差
;
其中正确命题的序号为( )
①在等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095397b70a73758437ba2198b61fd79b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb679318d0c9819b82e51a1750b502a.png)
②任意两个实数a,c的等比中项为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/169b55e4b8203bc7fa3597229de648ec.png)
③若等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45482d31d1d7448c9f3922b4d2a55331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7653925d3f05c893cfe08c7c22f3751.png)
④数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39bacf2989caafaba2ed8d36171f912.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90eb772927e69564d3ae98f716fa4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c88248a34d270530f9d01570a911878.png)
⑤等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f8e68eb4ade6e22982d2df5102d8894.png)
其中正确命题的序号为( )
A.②④ | B.③⑤ | C.①⑤ | D.③④⑤ |
您最近一年使用:0次
9 . 对长期吃含三聚氰胺的婴幼儿奶粉与患肾结石这两个分类变量的计算中,下列说法正确的是
A.若![]() ![]() ![]() ![]() ![]() |
B.从独立性检验可知有![]() ![]() |
C.若从统计量中求出有![]() ![]() |
D.以上三种说法都不正确 |
您最近一年使用:0次
2019-10-13更新
|
382次组卷
|
2卷引用:辽宁省抚顺市第十中学2018-2019学年高二下学期期中考试数学(文)试题
名校
10 . 已知两条不重合的直线
和
,两个不重合的平面
和
,下列四个说法:
①若
,
,
,则
;
②若
,
,则
;
③若
,
,
,
,则
;
④若
,
,
,
,则
.
其中所有正确的序号为( )
![](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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d6a7aec04e1d5768ef830b534460a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb74d1dd9a5c29da15e6cdaae435af86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fbc714c63815dad9a27418f6492f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fbc714c63815dad9a27418f6492f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d2a947e3fdc214d40a7d3f54679a73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b330d69a949d9b55f4b6f18f47e0a37.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d2a947e3fdc214d40a7d3f54679a73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e076b91a9178217532e11c496400e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542a1572078188c8fbe82ebddf8af3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb74d1dd9a5c29da15e6cdaae435af86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73d51665f7e628b34b4cb5e637222e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5475e10ea3f37788e680395999037a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057cdb4057bca398a838e868efd360f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187f7895012551f2067f0b77d8df2141.png)
其中所有正确的序号为( )
A.②④ | B.③④ | C.④ | D.①③ |
您最近一年使用:0次