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 . 已知曲线
,
,
,P为C上异于A,B的一点,直线
与直线
交于M,直线
与直线
交于点N,则有以下四种说法:
①存在两个定点,使得P到这两个定点的距离之和为定值
②直线
与直线
的斜率之差的最小值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
③
的最小值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad28387ae313e0d6528cb4f809acc0f7.png)
④当直线
的斜率大于
时,
大于![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99797d2ad06e662bf2d245b8e3f5ef70.png)
其中正确命题的序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ea3f1431ae5a8a0d30a94cafa7b71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da322ac8867e8a47c6588601078abf18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39cc033406da2cdd342308972c6701f1.png)
①存在两个定点,使得P到这两个定点的距离之和为定值
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084cf5ffced059f5653ee2a1023518b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad28387ae313e0d6528cb4f809acc0f7.png)
④当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084cf5ffced059f5653ee2a1023518b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99797d2ad06e662bf2d245b8e3f5ef70.png)
其中正确命题的序号为
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3 . 已知函数
,
,
恰有
个零点
、
、
,且
,有下列结论:
①
;
②
;
③
;
④
.
其中正确结论的序号为______ .(填写所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8467c9cc9e33d79353824c92295006c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9aa676fad54f444d64c488445c05c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.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/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1310a7a80d1f8751a3f8cafe7f8c8b4.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9440f2d7ae0b2039fd68e50aec92d55f.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559566a2c371f26140a968ba4675f1ce.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b50babdf93967de25ebcf5f09d55381.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/053bbe2262e60c7729b13fbd77729f44.png)
其中正确结论的序号为
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4 . 已知函数
和
,若
,现有下列4个说法:①
;②
;③
;④
.其中所有正确说法的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9cc7f5b6853e3e6d0b8ba16ea81edc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9963dcc20d9a6467213797e65f947426.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23b2604e5f8be78fbe6cafcb9b7f2f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419504736c4934f6e0df4114c3743944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a42526840a0fc525571737bed3d1af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e431fbe9d32c1fb868e4e3d2e1bd81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d9b616bddad1c2d129975b2a3067603.png)
A.①②④ | B.①②③ | C.②③ | D.①③④ |
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5 . 给出以下四个命题:
①设
是空间中的三条直线,若
,
,则
.
②在面积为
的
的边
上任取一点
,则
的面积大于
的概率为
.
③已知一个回归直线方程为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c15b7dfc30d05516d0054a4e3cf598.png)
,则
.
④数列
为等差数列的充要条件是其通项公式为
的一次函数.
其中正确命题的序号为________ .(把所有正确命题的序号都填上)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048e833e0c0995d4cf039ed30ba38b56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d4fc47a5814493cc5facdc3ab296dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1dd133d58073910a0bf45dfaf970130.png)
②在面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a80b31f7ad4793b8097d7f5dac0aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
③已知一个回归直线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c15b7dfc30d05516d0054a4e3cf598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ed4b2fde491b69f244139ec262e334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ffdebe1a9d874014442f2f00b3ff8e6.png)
④数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
其中正确命题的序号为
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6 . 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
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7 . 若存在实常数k和b,使得函数
对其公共定义域上的任意实数x都满足:
恒成立,则称此直线
的“隔离直线”,已知函数
(e为自然对数的底数),有下列命题:
①
内单调递增;
②
之间存在“隔离直线”,且b的最小值为
;
③
之间存在“隔离直线”,且k的取值范围是
;
④
之间存在唯一的“隔离直线”
.
其中真命题的序号为__________ .(请填写正确命题的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef655f5ecd8e5f7798c6e6747ba999b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c34f5d4207fbf261bdbcf0926155230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c17624c234559f04f5d94b7077f169a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55adeff09c4d3d878785239f0bf2e27a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffc247e5237219a6169648a3d20483c9.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b814095580525ddc8176650af6b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b814095580525ddc8176650af6b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c768cd9231a15caad0839f05d0f9207c.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8945c5bbc31c6617924d2c8aa29a091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17432e76b39908abe390d80f3c97f476.png)
其中真命题的序号为
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名校
8 . 已知椭圆
的左,右焦点分别为
,直线
与椭圆
交于
两点,给出下列结论:①若
,则
;②
与
不可能平行;③若
,则
;④
与
不可能垂直.其中正确结论的序号为__________ (请把正确结论的序号全部填写在横线上).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9835aacabfaabdf7e61da1d4e08b225a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd55f837e9c4e6bba1163ef13edd09b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d73fbfd1b2f4b67ba5452bedcd1f5433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2015d9a88fb4d8f0520790693abc9649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80ecb6b5d5eca464b3f099513c08fc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c429b542abf0ebee74a239b4857cf88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288060bacca802a86ff209ddfd412e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d76a73553016ef953653c8d92cd14d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabea664e61863b3b3279dbce607924e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86dbcf83cd5d3421b3eed7be7dab32d.png)
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9 . 下列结论:
①若
,则“
”成立的一个充分不必要条件是“
,且
”;
②存在
,使得
;
③若
在
上连续且
,则
在
上恒正;
④在锐角
中,若
,则必有
;
⑤平面上的动点
到定点
的距离比
到
轴的距离大1的点
的轨迹方程为
.
其中正确结论的序号为_________ .(填写所有正确的结论序号)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a9344f4fca7b9779ca7720e5277ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bec124eb33e5ab4601b4b70f70913b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
②存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d5abce09e73e31b37961de3da8fa38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ef778b8c90778644b6f34d2f851b0.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b639b8a34097101c0a4767ea34c13884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec863a58386c4ef4816602a36d9daa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b639b8a34097101c0a4767ea34c13884.png)
④在锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ac8e446826ea6e653cd1ac6d5d6106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2264c134952d41fb9bcb90e6c72c83.png)
⑤平面上的动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
其中正确结论的序号为
您最近一年使用:0次
2018-03-02更新
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386次组卷
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2卷引用:河南省豫南九校2018届高三下学期第一次联考试题理科数学
10 . 函数
图像上不同两点
,
处的切线的斜率分别是
,
,
为
两点间距离,定义
为曲线
在点
与点
之间的“曲率”,给出以下命题:
①存在这样的函数,该函数图像上任意两点之间的“曲率”为常数;
②函数
图像上两点
与
的横坐标分别为1,2,则 “曲率”
;
③函数
图像上任意两点
之间的“曲率”
;
④设
,
是曲线
上不同两点,且
,若
恒成立,则实数
的取值范围是
.其中正确命题的序号为_____________ (填上所有正确命题的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ff82ebdfad5e7de1c7487b0b817a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a53e311ee0b5085e7e5a45c606daa5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8605ae9897d5d6f0679b4aa80e014bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b3e87e9bb00d9ba09cb5660aebd76f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2847109c229d904f22819e564cdf151d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
①存在这样的函数,该函数图像上任意两点之间的“曲率”为常数;
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44bbfed9f9a393d712d79cf51c942999.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/316db967a70305dcd846281b29f421db.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2d520289f2ec0ac94d6e15a3c92b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a89a55c786b314c1de184fcf719eb69.png)
④设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ff82ebdfad5e7de1c7487b0b817a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a53e311ee0b5085e7e5a45c606daa5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d70266454df40256268b19b055a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aeab36f3c3546b641470aad464ebd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d54d4444cd3d44a4e72c68a6013a21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a1f815b0e0b6516b684a93e1850667.png)
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