1 . 定义全集
的子集
的特征函数
,这里
表示
在全集
中的补集,那么对于集合
、
,下列所有正确说法的序号是______ .
(1)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9035cc9d963cb84c8da6014a6e062f6b.png)
(3)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52b4f24969673c863b5aff4fb6751ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2193c95efaedd61ff49a7ff91df9e97a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c093cbde3d3472d1f7f2b0dff2bc4881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52b4f24969673c863b5aff4fb6751ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c38edfcbc6d0348a9fc75376f629909.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a11863d06650c0adafb18d2909336e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9035cc9d963cb84c8da6014a6e062f6b.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6409ca7b7ab3c4aa4e0b9abc8d2cb066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749b06c4f14826c3b0a5b37e4356aa64.png)
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2020-02-23更新
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1063次组卷
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4卷引用:湖南省衡阳县创新实验班2019-2020学年高一上学期期末数学试题
湖南省衡阳县创新实验班2019-2020学年高一上学期期末数学试题重庆市万州二中教育集团2022-2023学年高一上学期第一次质量检测数学试题(已下线)高一上学期期中考试填空题压轴题50题专练-举一反三系列上海市七宝中学、松江一中、松江二中2024届高三上学期11月联考数学试题
2 . 以下各说法中:
①若等比数列
的前
项和为
,
,则实数
=-1;
②若两非零向量
,若
,则
的夹角为锐角;
③在锐角△ABC中,若
,则
,
④已知数列
的通项
,其前
项和为
,则使
最小的
值为5
其中正确说法的有________ (填写所有正确的序号)
①若等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b794ed9de8e93de6e067c3d0259558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②若两非零向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbc0945b4e1962e66f6f7e7f6af235d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
③在锐角△ABC中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa8d75a6638e08eedbff8662267da6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b56c0452faa9377574227c3df2b4c46.png)
④已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c4593f37ce523cfa8fb5c102240319.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
其中正确说法的有
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2019-05-23更新
|
243次组卷
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2卷引用:湖南省长沙市麓山国际实验学校2022-2023学年高三上学期入学考试数学试题
3 . 将边长为1的正方形
沿对角线
折起,使得平面
平面
,在折起后形成的三棱锥
中,给出下列三种说法:
①
是等边三角形;②
;③三棱锥
的体积是
.
其中正确的序号是__________ (写出所有正确说法的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06123e81c41198c76a3335757fac2c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba05eed0b25ee0ee6b0e7fcd09fda1ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0467b0675c3ecfb282cc88255284d3e1.png)
其中正确的序号是
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|
621次组卷
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23卷引用:2014-2015学年湖南省长沙市周南中学高一下学期第三次月考数学试卷
2014-2015学年湖南省长沙市周南中学高一下学期第三次月考数学试卷(已下线)云南省昆明三中10-11学年高一下学期期末考试数学(已下线)2011-2012学年福建省八县一中高一上学期期末考试数学(已下线)2011-2012学年福建省罗源一中高一第一学期期末考试数学试卷(已下线)2011-2012学年吉林省油田高中高一上学期期末考试数学试卷(已下线)2011-2012学年福建省厦门六中高一下学期期中数学试卷(已下线)2012-2013学年吉林省吉林市普通中学高一上学期期末考试数学试卷(已下线) 2012-2013学年四川省遂宁二中高二上学期期中考试数学试卷(已下线)2013-2014学年山西省康杰中学高二第一学期期中考试理科数学试卷(已下线)2013-2014学年山西省康杰中学高二第一学期期中考试文科数学试卷(已下线)2013-2014学年福建省清流一中高一下学期第二次阶段考数学试卷2015-2016学年甘肃省会宁县一中高一上学期期末数学试卷(已下线)北京市第四中学(房山分校)2016-2017学年高二上学期期中考试数学(理)试题人教A版高中数学必修二模块质量评估(B卷)北京海淀育英学校2017-2018学年高二上学期期中考试数学(理)试题北京市西城三十一中2017-2018学年高二上学期期中考试数学试题2018年人教A版数学必修二模块测试卷【市级联考】吉林省吉林市第一中学2018-2019学年高一上学期期末考试数学(理)试题吉林省梅河口市朝鲜族中学2019-2020学年高一上学期期末考试数学试题吉林省梅河口市三校2019-2020学年高一上学期期末联考数学试题吉林省长春市汽车经济技术开发区第六中学2020-2021学年第一学期高二月考数学(文)试题吉林省长春市汽车经济技术开发区第六中学2020-2021学年第一学期高二月考数学(理)试题广西百色市平果县第二中学2019-2020学年高一下学期期中考试数学试题
名校
4 . 下列说法中,所有正确说法的序号是______ .
①终边落在y轴上的角的集合是
;
②函数
图象的一个对称中心是
;
③函数y=tanx在第一象限是增函数;
④已知
,f(x)的值域为
,则a=b=1.
①终边落在y轴上的角的集合是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e7e8682ba79b15306f55c628e41ed3.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ce622c391bea1cbe2dfb1f0c13618b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5717a16aa38dc3a7c44d784fbb68a535.png)
③函数y=tanx在第一象限是增函数;
④已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6beb2b7d217aba8949ed8994d4d407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a1ffbc9268ca8eaf0b53657c548880b.png)
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2017-07-21更新
|
638次组卷
|
3卷引用:湖南省衡阳市第八中学2016-2017学年高一下学期理科实验班结业(期末)数学试题
解题方法
5 . 已知点
与点
在直线
的两侧,给出下列说法:
①
;②当
时,
有最小值,无最大值;③
;④当
且
,
时,
的取值范围是
. 其中所有正确说法的序号是_______ .
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/ca00bf3212ef416e962709cbeac46501.png?resizew=49)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/482f4a230ff24e8a88e2b017bb837741.png?resizew=44)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/3f583358af884f4ca2e6c0e10e8f9f30.png?resizew=107)
①
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/7a6bb319bd4342dbae6651b88065a616.png?resizew=105)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/6e65a2ddcb754a259380ce2815b9bb8d.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/c407a70a517a42128e980659158fe255.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/9a7eb345e03f4b4da6b0311e6247721f.png?resizew=88)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/6e65a2ddcb754a259380ce2815b9bb8d.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/17c01a869f9a439fbfc643dcd76b46e0.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/e889e56d7caf453faae74a4af39f4ede.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/e58cc1d707824066ac6664553e7faa60.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573180900163584/1573180906373120/STEM/a185cbbe827d47fa8bf04d51e8be8210.png?resizew=127)
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14-15高一上·湖南·期末
6 . 在平面直角坐标系内,设
、
为不同的两点,直线
的方程为
, 设
有下列四个说法:
①存在实数
,使点
在直线
上;
②若
,则过
、
两点的直线与直线
平行;
③若
,则直线
经过线段
的中点;
④若
,则点
、
在直线
的同侧,且直线
与线段
的延长线相交
上述说法中,所有正确说法的序号是_____________
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/f04ec3c0af7e4d2f9e230d8dfdce1a53.png?resizew=67)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/efadc7f0be644e829aca6f2026d81594.png?resizew=67)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/844046db10fc4179ba8f3bb4b5f4e832.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/c5e37406297c4cc0b7a3a3977001c165.png?resizew=99)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/12d4558f9ca74d0391b0c3e19d8ba5d1.png?resizew=117)
①存在实数
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/b2a6ae7937424fb785f53e040aac9f3b.png?resizew=15)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/ceacd8043356434a835a6434856ddce3.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/844046db10fc4179ba8f3bb4b5f4e832.png?resizew=9)
②若
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/3eecf3a886884412b0e438e21231171b.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/8aab72ce677146d191625325eef9351b.png?resizew=21)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/ceacd8043356434a835a6434856ddce3.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/844046db10fc4179ba8f3bb4b5f4e832.png?resizew=9)
③若
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/0ee1eee61ac14a10914e8d2d17de77b4.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/844046db10fc4179ba8f3bb4b5f4e832.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/87e7a3ca0b2441a6aab5f3d60f715a74.png?resizew=31)
④若
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/5791add589924e8cacfaf9ceeb324072.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/8aab72ce677146d191625325eef9351b.png?resizew=21)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/ceacd8043356434a835a6434856ddce3.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/844046db10fc4179ba8f3bb4b5f4e832.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/203e1bf9fdaf441a827a51c2bff2fce9.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2014/3/3/1571538912477184/1571538918326272/STEM/87e7a3ca0b2441a6aab5f3d60f715a74.png?resizew=31)
上述说法中,所有正确说法的序号是
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