2012·四川自贡·三模
1 . 对于三次函数
,定义
是
的导函数
的导函数,若方程
有实数解
,则称点
为函数
的“拐点”,可以证明,任何三次函数都有“拐点”,任何三次函数都有对称中心,且“拐点”就是对称中心,请你根据这一结论判断下列命题:
①任意三次函数都关于点
对称:
②存在三次函数
有实数解
,点
为函数
的对称中心;
③存在三次函数有两个及两个以上的对称中心;
④若函数
,则: ![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/cbdd6b14556e4870b23f8c1dcfe4e3ad.png?resizew=373)
其中正确命题的序号为_____ (把所有正确命题的序号都填上).
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/21ac331a5b0e4b30b00b0bfc8770a14a.png?resizew=213)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/60cd76baa3484586a3fab13c0e7d75f7.png?resizew=41)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/ca5c67acb37e4344aca4776bfadbb516.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/9b22cb4ef676428f863b199d569eff7a.png?resizew=65)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/4aeca168313f4352a09e9371cf7fe4f8.png?resizew=67)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/bed6f27974b441c4901f45d1999f3071.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/4a1972c93ff74273a10d6e3a25e47433.png?resizew=75)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/ca5c67acb37e4344aca4776bfadbb516.png?resizew=61)
①任意三次函数都关于点
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/86f6c82c145b4959a4570a0ff352e9e1.png?resizew=104)
②存在三次函数
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/9263178288534479a8555ceebddfcf6e.png?resizew=64)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/bed6f27974b441c4901f45d1999f3071.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/4a1972c93ff74273a10d6e3a25e47433.png?resizew=75)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/ca5c67acb37e4344aca4776bfadbb516.png?resizew=61)
③存在三次函数有两个及两个以上的对称中心;
④若函数
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/6f90ab20b1234a0b8c61bb78c5026c69.png?resizew=155)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/cbdd6b14556e4870b23f8c1dcfe4e3ad.png?resizew=373)
其中正确命题的序号为
您最近一年使用:0次
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
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2019-05-17更新
|
348次组卷
|
3卷引用:步步高高二数学暑假作业:【理】 作业1 集合与常用逻辑用语
名校
3 . 给出下列三种说法:
①命题p:∃x0∈R,tan x0=1,命题q:∀x∈R,x2-x+1>0,则命题“p∧(
)”是假命题.
②已知直线l1:ax+3y-1=0,l2:x+by+1=0,则l1⊥l2的充要条件是
=-3.
③命题“若x2-3x+2=0,则x=1”的逆否命题为“若x≠1,则x2-3x+2≠0”.
其中所有正确说法的序号为________________ .
①命题p:∃x0∈R,tan x0=1,命题q:∀x∈R,x2-x+1>0,则命题“p∧(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
②已知直线l1:ax+3y-1=0,l2:x+by+1=0,则l1⊥l2的充要条件是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2122e3f1e76a635e58e4d54aa594c552.png)
③命题“若x2-3x+2=0,则x=1”的逆否命题为“若x≠1,则x2-3x+2≠0”.
其中所有正确说法的序号为
您最近一年使用:0次
2016-12-05更新
|
991次组卷
|
6卷引用:2016-2017学年河北馆陶县一中高二上期中数学试卷
2016-2017学年河北馆陶县一中高二上期中数学试卷黑龙江省海林市朝鲜族中学高三数学人教版选修1-1同步练习:第一章 常用逻辑用语单元测评江西省会昌中学2018-2019学年高二上学期第一次月考数学(理)试卷辽宁省沈阳市郊联体2018-2019 学年高二上学期数学(文科)期末试题(已下线)专题1.3 简单的逻辑联结词、全称量词与存在量词(精练)-2021年高考数学(文)一轮复习学与练广西壮族自治区钦州市第四中学2023届高三上学期9月考试数学(文)试题
名校
4 . 下列说法中:
①“若
,则
”的否命题是“若
,则
”;
②“
”是“
”的必要非充分条件;
③“
”是“
或
”的充分非必要条件;
④“
”是“
且
”的充要条件.
其中正确的序号为__________ .
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bad6987e8abfbf07d6a2650483d2a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bad6987e8abfbf07d6a2650483d2a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e30c903d8f8a05332af0b19e7e40df3.png)
②“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfcffd48bd96e513072d998b69b6629.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3056bd950bb55035358d45d1b7d354c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c925c4283740ce6cc412c1c5f57b0a.png)
④“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80c89052d44692bfd1e37805035fb5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a871ef7bf13de3e15489d65b57a3cc.png)
其中正确的序号为
您最近一年使用:0次
5 . 在下列给出的命题中,所有正确命题的序号为____________ .
①若
为互斥事件,则
;
②若
,则
成等比数列;
③经过两个不同的点
、
的直线都可以用方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4987b682f2616cf2d3363c0409e3006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4954bf80c348915da86a442e1c912b95.png)
来表示;
④若函数
对一切
满足:
,则函数
为奇函数或偶函数;
⑤若函数
有两个不同的零点
,则
.
①若
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/d36378b1a4444f95af26d11c5fa79f6e.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/45db5892819b4f02ab5b9f03edfecc2f.png?resizew=108)
②若
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/7ee33a1e3fba43df9731ba4f8efe0cd4.png?resizew=51)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/94e995d0e55d4891a80f86073aef3f7c.png?resizew=40)
③经过两个不同的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec391f08f1452fb3e0aebe7e12ba4fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a4422395ca20fe847419ec569e48b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4987b682f2616cf2d3363c0409e3006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4954bf80c348915da86a442e1c912b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41939a729cdeb8e79b9e9bd3fae11fb.png)
④若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/140d5d745c4349fda7a8d1c68d90b7db.png?resizew=101)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/e6eda5a6e2ca480883e4177f3f1121d3.png?resizew=36)
⑤若函数
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/185b8378da4a44c7997e903c715dacfa.png?resizew=137)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/6a113b06ab2b42359077821fdbb05127.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/bd596a32f8d5488fb6af21a5b7bbff70.png?resizew=60)
您最近一年使用:0次
6 . 已知命题
:“若
,则
有实数解”的逆命题;命题
:“若函数
的值域为
,则
”.以下四个结论:
①
是真命题;②
是假命题;③
是假命题;④
为假命题.
其中所有正确结论的序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f160cc4fd73afd64c14af6d355aa84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53bbfbb39affc80bec7148c0595cbed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f3de3c22cb75669ec3526f82a946937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751afe327bd2cd6e0d2336556ee5aded.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/094543346d88c4ed45c1b1fb91f5265b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba854cbca86f7a9350d0ee5e19160c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9aacc4fa7d44974d18a3fb9e290b5c.png)
其中所有正确结论的序号为
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7 . 对于函数
,现给出四个命题:
①
时,
为奇函数;
②
的图象关于
对称;
③
时,方程
有且只有一个实数根;
④方程
至多有两个实数根
其中正确命题的序号为__________ .
![](https://img.xkw.com/dksih/QBM/2015/12/10/1572351240077312/1572351246090240/STEM/a7aa9b5b63504ac7b8612872251502ec.png?resizew=140)
①
![](https://img.xkw.com/dksih/QBM/2015/12/10/1572351240077312/1572351246090240/STEM/91b66410cdfd4499b02c23add720e466.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2015/12/10/1572351240077312/1572351246090240/STEM/246b360754924bd79dbdad57cc664d4c.png?resizew=36)
②
![](https://img.xkw.com/dksih/QBM/2015/12/10/1572351240077312/1572351246090240/STEM/9965fb61cbf644aca84c04d9925bbd86.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2015/12/10/1572351240077312/1572351246090240/STEM/a97d06b243cf49338bd65a98831c771f.png?resizew=37)
③
![](https://img.xkw.com/dksih/QBM/2015/12/10/1572351240077312/1572351246090240/STEM/2ab5ce4247b64f22bd80de2abc13e900.png?resizew=79)
![](https://img.xkw.com/dksih/QBM/2015/12/10/1572351240077312/1572351246090240/STEM/17184c2c32e1430fba7e60ba9d21a012.png?resizew=60)
④方程
![](https://img.xkw.com/dksih/QBM/2015/12/10/1572351240077312/1572351246090240/STEM/17184c2c32e1430fba7e60ba9d21a012.png?resizew=60)
其中正确命题的序号为
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11-12高一上·河北衡水·期中
8 . 有下列四个命题:
①函数
为奇函数;
②函数
的值域为
;
③已知集合
,若
,则a的取值集合为{-1,13};
④集合A={非负实数},B={实数},对应法则f:“求平方根”,则f是A到B的映射.
其中正确命题的序号为:___________
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926b43dbd35eff88523739d4ba9220a2.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/265f0662653525c979b3de4d60d75ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69c4421a0953af741c3254c09c667f8.png)
③已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c031143a2fc778038fd4b1192cdc42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
④集合A={非负实数},B={实数},对应法则f:“求平方根”,则f是A到B的映射.
其中正确命题的序号为:
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11-12高二上·广东揭阳·阶段练习
名校
9 . ①一个命题的逆命题为真,它的否命题一定也为真:
②在
中,“
”是“
三个角成等差数列”的充要条件;
③
是
的充要条件;
④“
”是“
”的充分必要条件;
以上说法中,判断错误的有_______________ .
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c1e84aaa7e1b5c1283075b36c72fb5.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403b18b04a7de9e79384b602834d3faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e59402e777165471831d1b6d458584a1.png)
④“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91bcddc2ece6bcde9355e222e1cf9f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
以上说法中,判断错误的有
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2018-01-07更新
|
592次组卷
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4卷引用:2011-2012年广东省揭阳一中高二上学期第二阶段理科数学
(已下线)2011-2012年广东省揭阳一中高二上学期第二阶段理科数学天津市蓟州区第一中学2017-2018学年度高二第一学期第二次月考数学(理)试题新疆伊西哈拉镇中学2018-2019学年高二上学期期末数学试卷福建省福州福清市2017-2018学年学年高二上学期期末考试数学(理)试题
名校
10 . 给出下列说法:
(1)命题“
,
”的否定形式是“
,
”;
(2)已知
,则
;
(3)已知回归直线的斜率的估计值是2,样本点的中心为
,则回归直线方程为
;
(4)对分类变量
与
的随机变量
的观测值
来说,
越小,判断“
与
有关系”的把握越大;
(5)若将一组样本数据中的每个数据都加上同一个常数后,则样本的方差不变.
其中正确说法的个数为( )
(1)命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea97dc49e5857619425953f88245fdf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae19515516016bb679a5bda763e0ba59.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6e3e55bcdd39823a8e59ac30fb9ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f527e1add10f68fbb559d425af6217df.png)
(3)已知回归直线的斜率的估计值是2,样本点的中心为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1beb189381103ad1e758fd8cfedb6355.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88268a2e8aeb1beceaf04b81225cebd5.png)
(4)对分类变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2581192317ef233ccdccfc48ac29b52b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
(5)若将一组样本数据中的每个数据都加上同一个常数后,则样本的方差不变.
其中正确说法的个数为( )
A.2 | B.3 | C.4 | D.5 |
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