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;
(4)若向量
,
,且
是锐角,则实数的取值范围为
;
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/92764eb4fd255796e92c2c4db5909efc.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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)
(4)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62eed5791457162b13ee2441e4ce5a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c0e5d846bda84a19077cc7ad8f4ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe6d51b27236dbd7f32f5e1ac86c9e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a891eb0f07654c6dda4380b2fae38e8a.png)
其中所有正确命题的序号为
您最近一年使用:0次
2020-07-25更新
|
502次组卷
|
2卷引用:四川省眉山市2019-2020学年高一下学期期末考试数学试题
2 . 下列结论:
①若命题
:
,
;命题
:
,
,则命题“
”是假命题;
②已知直线
:
,
:
,则
的充要条件是
;
③“设
,若
,则
”的否命题为:“设
,若
,则
”.
其中正确结论的序号为________ (把你认为正确结论的序号都填上).
①若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f160d875700c3e047273fa7dd8b09d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae4ff4ee36111cbef3e6076e6354dcba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e48ebdd742cb5d310c21a384d599bc6.png)
②已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e58af7f2f36dd935c1e0f253be947a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd968207ac63b470062bbfa620213ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce08b357f11ef44c3e8207ac574422a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a9306db4c13f449bb6f41fc97865dc.png)
③“设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e2031df853535e4b8edcf41ee5eb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e952944ec2c6d9012a4d0c17c2152c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60757c09dbb2b566f91b4a90cf297145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac5728d67e10fcac08b75ce58b90a52.png)
其中正确结论的序号为
您最近一年使用:0次
2019-05-17更新
|
348次组卷
|
3卷引用:安徽省滁州市定远县育才学校2019-2020学年高二下学期期末数学(文)试题
3 . 已知曲线F(x,y)=0关于x轴、y轴和直线y=x均对称,设集合S={(x,y)|F(x,y)=0,x∈Z,y∈Z}.下列命题:
①若(1,2)∈S,则(-2,-1)∈S;
②若(0,2)∈S,则S中至少有4个元素;
③S中元素的个数一定为偶数;
④若{(x,y)|y2=4x,x∈Z,y∈Z}⊆S,则{(x,y)|x2=-4y,x∈Z,y∈Z}⊆S.
其中正确命题的序号为______ .(写出所有正确命题的序号)
①若(1,2)∈S,则(-2,-1)∈S;
②若(0,2)∈S,则S中至少有4个元素;
③S中元素的个数一定为偶数;
④若{(x,y)|y2=4x,x∈Z,y∈Z}⊆S,则{(x,y)|x2=-4y,x∈Z,y∈Z}⊆S.
其中正确命题的序号为
您最近一年使用:0次
2019-04-26更新
|
573次组卷
|
3卷引用:重庆市第一中学2018-2019学年高二下学期期末数学(理)试题
4 . 给出如下四种说法:
①四个实数
依次成等比数列的必要而不充分条件是
.
②命题“若
且
,则
”为假命题.
③若
为假命题,则
均为假命题.
④若数列
的前项n和
,则该数列的通项公式
.
其中正确说法的序号为________ .
①四个实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d10449bc77d692a7270e0f20a68cdf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd68c14adb3cf12d8f77aec55a053284.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee18d7a40f7a7e0dc85b1bd75bf750c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a583e1950f97c1c88fc322421fd1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efe748266e2c04f5a887947312199e8c.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
④若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c8a478678a8db5e26aa9eff0298a2b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032ee491b2830e8427c307ddce4e607b.png)
其中正确说法的序号为
您最近一年使用:0次
5 . 以下4个命题中,正确命题的序号为_________ .
①“两个分类变量的独立性检验”是指利用随机变量
来确定是否能以给定的把握认为“两个分类变量有关系”的统计方法;
②将参数方程
(
是参数,
)化为普通方程,即为
;
③极坐标系中,
与
的距离是
;
④推理:“因为所有边长相等的凸多边形都是正多边形,而菱形是所有边长都相等的凸多边形,所以菱形是正多边形”,推理错误在于“大前提”错误.
①“两个分类变量的独立性检验”是指利用随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2581192317ef233ccdccfc48ac29b52b.png)
②将参数方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315b7af2d3ed6605ad233411568a453a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5b9af2c3d4abeba615fe01211c6150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
③极坐标系中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405c80ca17494de60a5ec93802582a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de31a7b108b0fdc888133f701e7c79b3.png)
④推理:“因为所有边长相等的凸多边形都是正多边形,而菱形是所有边长都相等的凸多边形,所以菱形是正多边形”,推理错误在于“大前提”错误.
您最近一年使用:0次
6 . 以下几种说法
①命题“
,函数
只有一个零点”为真命题
②命题“已知
,
,若
,则
或
”是真命题
③“
在
恒成立”等价于“对于
,有
”
④
的内角
,
,
的对边分别为
,
,
,则“
”是“
”的充要条件.
其中说法正确的序号为( )
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2c9043ff925c1fb693afd1516dbcf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a12e04dcaf2cde31b57e86a3b41f471.png)
②命题“已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54dad48527a47eab4a5916ab0421cc71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34982de5d3f287cd570ea30eb46d185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d09b9fc9719ff6faf32254b9d48713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be861d83cddb5fc8aa22f7f0f9415d6.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e871c54f8021e1f0da4d552e38d8814f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53224898de85a85058ad336490bbbaa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53224898de85a85058ad336490bbbaa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02a486133c2f49aa028e8b13fb40b05.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048efda6ae51eb780e95ed3505b7be04.png)
其中说法正确的序号为( )
A.①③ | B.①④ | C.②③ | D.②④ |
您最近一年使用:0次
7 . 有下列命题:
①函数
的定义域为
;
②不等式
的解集为
,则实数k的取值范围为
;
③函数
是定义在
上的偶函数,当
时,
.则当x<0时,
.
其中正确命题的序号为______ (把正确的答案都填上).
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4f9d8fa95e956e30338023526a50c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9612ee6c787e8f02ce3d3cde6692c4.png)
②不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6d03dfc5b4ce38e17403b3b49fdc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e79446191602c1d2f941728ba8591b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e7123d1bc017045dfdb2c3d741bc11.png)
其中正确命题的序号为
您最近一年使用:0次
2023-02-24更新
|
574次组卷
|
2卷引用:天津市七区2022-2023学年高一上学期期末数学试题
10-11高二·福建福州·期末
8 . 以下四个命题:
①
是函数
的极值点;
② 当
无限趋近于
时,
无限趋近于
;
③
是
的必要不充分条件,则
是
的充分不必要条件;
④在
中,“
”是“
”的必要不充分条件.
其中真命题的序号为_____ (写出所有真命题的序号)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2899fba91f6c9441a4eb514f0be7e3a.png)
② 当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcd1c6b9feb56cf15b5f706e0a6735a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5040d31e784398842b04ed7dd0aacc10.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
④在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c253e2d257e9d313c50dc7308b3739ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d236e7315396d77ee666880edd1bef49.png)
其中真命题的序号为
您最近一年使用:0次
11-12高二上·辽宁锦州·期末
解题方法
9 . 给出下列命题:
①命题“所有的正方形都是矩形”的否定是“所有的正方形都不是矩形”;
②设
为简单命题,则“
”为假是“
”为假的必要而不充分条件;
③函数
的极小值为
,极大值为
;
④双曲线的渐近线方程是
,则该双曲线的离心率是
.
⑤等差数列
中首项为
,则数列
为等比数列;
其中真命题的序号为 (写出所有真命题的序号)
①命题“所有的正方形都是矩形”的否定是“所有的正方形都不是矩形”;
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18fbac3b04744429a839e1cd0a9da704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54b6a060d6c51a328341df76013bd89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e1a1611f320c0f358df77aaae3f942.png)
④双曲线的渐近线方程是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0f4b0890e4659c9cf8bcbb5dcf9ade.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59ab85c075a09d55d69e159e4abb268.png)
⑤等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4844ada5b5eb39d704345bb4e6080d99.png)
其中真命题的序号为 (写出所有真命题的序号)
您最近一年使用:0次
名校
10 . 现给出五个命题:
①
,
;
②
;
③
;
④
的最小值等于4;
⑤若不等式
对
都成立,则
的取值范围是
.
所有正确命题的序号为______
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02cdab65718a2348c2339da2ed817edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61873626c729b6ffb54ab57f443ca7f1.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/805b980c5b4364b1dd46ec867876ce0c.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb1214e2343ec1b743c85095ef252d3.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25df771e19cb89dfef424b0da43affbb.png)
⑤若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed90eacae8a693dcf21d7dcceb09c76e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a9d91ab6c15386c106f9dbbf0a5170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650b4b77c199d97a5b133b5dd5d9fbcb.png)
所有正确命题的序号为
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4卷引用:黑龙江省牡丹江一中2019-2020学年高二(下)期末数学(文科)试题
黑龙江省牡丹江一中2019-2020学年高二(下)期末数学(文科)试题黑龙江省牡丹江市第一高级中学2019-2020学年高二7月月考(期末)数学(文)试题(已下线)第1章 常用逻辑用语(提高卷)-2020-2021学年高二数学课时同步练(苏教版选修2-1)(已下线)单元卷 常用逻辑用语(提高卷)-2020-2021学年高二数学课时同步练(苏教版选修1-1)