1 . 对任意集合
,定义
,已知集合
、
,则对任意的
,下列命题中真命题的序号是________ .(1)若
,则
;(2)
;(3)
;(4)
(其中符合
表示不大于
的最大正数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea36d3a4a6e1a5dfa01a7af7a95020d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a800ef31648c8c46c33eb0a00c38f2b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fd9b15b5cdf1c131ebf7cf2776cf7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2425e1a3b595f4e3eb316bb7d8d24d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f497ef96fd6943affd9fd408c69c2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb0d1d4635f4fd50e849cd675f36d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d11ab717ded68137b8c0293edeec0768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ba3368f0d4ef6c4288c7c34f15618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc520cc41fdb61f9e3bd5d7c0baa1b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
2 . 已知
,函数
,
(
是自然对数的底数).
(Ⅰ)讨论函数
极值点的个数;
(Ⅱ)若
,且命题“
,
”是假命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5d5f3fced276f3127f2e3c0c428f9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9f357eae697e6758b13b7a13b593f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d218992d1942266d7208e476d0c4100.png)
(Ⅰ)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d176e1fcf07f69f98de820bf524236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba6f008ca86a6fe6b2b467254e388cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2017-05-10更新
|
2038次组卷
|
4卷引用:山东省淄博市2017届高三第二次模拟考试数学(理)试题
3 . 给出下列四个命题:
①“若
为
的极值点,则
”的逆命题为真命题;
②“平面向量
,
的夹角是钝角”的必要不充分条件是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9344f82269af22049dae76cb38c9debf.png)
③若命题
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99de6c1b54e0efa27a6de0afa326c623.png)
④命题“
,使得
”的否定是:“
均有
”.
其中不正确的个数是
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d53c8eaafc8f635a4e3c6e0cc6c4a6e2.png)
②“平面向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9344f82269af22049dae76cb38c9debf.png)
③若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a616c3565527cb4a170cf55ee75f44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99de6c1b54e0efa27a6de0afa326c623.png)
④命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ef6ac3a5f1358143e94eb31f6687d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1c77d129b56255baf3d76eb2a6c2ff.png)
其中不正确的个数是
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2017-08-30更新
|
2048次组卷
|
3卷引用:江西省(宜春中学、丰城中学、樟树中学、高安二中、丰城九中、新余一中)六校2018届高三上学期第五次联考数学(理)试题1
4 . 在平面直角坐标系中,定义
为两点
,
之间的“折线距离”,在这个定义下,给出下列命题:
①到原点的“折线距离”等于1的点的集合是一个正方形;
②到
,
两点的“折线距离”相等的点的集合是一条直线;
③到
,
两点的“折线距离”差的绝对值为1的点的集合是两条平行线;
④到
,
两点的“折线距离”之和为4的点的集合是一个六边形.
其中正确的命题是______ (写出所有正确的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3492041fb4db5729f5a61cdac6b9919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaef9b09f0ad5d4acfd1db15fcfef2cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efe1e38cae6bd74c3bdef355db8e1c89.png)
①到原点的“折线距离”等于1的点的集合是一个正方形;
②到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d4290699b1ad6ead1aeb7abf571e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39cfe151dba6ff15fe87727ab983a93.png)
③到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d4290699b1ad6ead1aeb7abf571e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39cfe151dba6ff15fe87727ab983a93.png)
④到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d4290699b1ad6ead1aeb7abf571e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39cfe151dba6ff15fe87727ab983a93.png)
其中正确的命题是
您最近一年使用:0次
名校
5 . 已知
为
上的偶函数,当
时,
.对于结论
(1)当
时,
;(2)函数
的零点个数可以为4,5,7;
(3)若
,关于
的方程
有5个不同的实根,则
;
(4)若函数
在区间
上恒为正,则实数
的范围是
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f45afdf4d717bb03adac6b899c367acb.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72d3f24ff789921509d751b967006a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c322b98669d82733108306842a83a69.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46305fedfb17a208a8b4cab7ebceddfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccdaf0d40b7153b5084e44b966ecbadf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
(4)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6379419627bb36cc2f289f9b9ef8881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50fea4f0abf56345b563f8ae7fb5416.png)
说法正确的序号是
您最近一年使用:0次
2017-11-18更新
|
1278次组卷
|
2卷引用:四川省成都七中2020届高一上半期期中数学试题
解题方法
6 . 给出下列说法:
①数列
,
,
,
,
…的一个通项公式是
;
②当
时,不等式
对一切实数x都成立;
③函数
是周期为
的奇函数;
④两两相交且不过同一点的三条直线必在同一个平面内.
其中,正确说法序号是_________ .
①数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b12efb03327f461e868b2ea433f9b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce0249a3ff99c083fa4421877549db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf4e57a8023222d2cdf88fad75ac496.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47212543d8a4ecf45f9509fe5ab8733b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6d03dfc5b4ce38e17403b3b49fdc15.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8250a1f5d4211d5dc1f47e1855245916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
④两两相交且不过同一点的三条直线必在同一个平面内.
其中,正确说法序号是
您最近一年使用:0次
名校
解题方法
7 . 函数
的定义域为
,若存在一次函数
,使得对于任意的
,都有
恒成立,则称函数
在
上的弱渐进函数.下列结论正确的是__________ .(写出所有正确命题的序号)
①
是
在
上的弱渐进函数;
②
是
在
上的弱渐进函数;
③
是
在
上的弱渐进函数;
④
是
在
上的弱渐进函数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26b255a8741a6ea41b372b184c560e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8893cfe1ac6b67bdb12cbd3e540186c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae63d882de903494cb145bfed14fcb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc69dd6b191f31ea8d87f867a456a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26b255a8741a6ea41b372b184c560e5.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4306fb6d5419322b4b7b9140e06e43a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11a131ca387d37323e00a38b9900cfe6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a117e2654de2baf925540cca08cbec.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02247b4e7ed5e004183a9369640ad6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b639ac9599358d08bd6e1c389ceb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a117e2654de2baf925540cca08cbec.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4538f7b6692d02fc3c2909b488632c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7ed99a74e126a05cb520f19c094020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a117e2654de2baf925540cca08cbec.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa1c68cebf2203d277f61cfdbacf175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a05ebb52ecf575c36d66163955c8f26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a117e2654de2baf925540cca08cbec.png)
您最近一年使用:0次
8 . 已知函数
,给出三个命题:①
的最小值为-4,②
是轴对称图形,③
.其中真命题的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243b50561bd1cfc5712af412a01bb19b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3022b4a726c235650b8d324b2e06dd8d.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
9 . 已知有两个不相等的非零向量
,两组向量
和
均由2个
和3个
排列而成,记
,
表示
所有可能取值中的最小值,则下列命题中真命题的序号是_________________ (写出所有真命题的序号)
①
有5个不同的值;
②若
,则
与
无关;
③若
,则
与
无关;
④若
,则
;
⑤若
,
,则
与
的夹角为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116e2e7116a7b5cd0a912ec0699ca017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d652b98f2db3c3002c9ef6fdc060d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142505aaa7b64eaba9421bd0fea9e3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be118f18e17dc2420b2c7021268c6bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494f173fed024b28d9e2bc7a96362d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ab55ce496dc3dfdf3f0c459ccf49cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494f173fed024b28d9e2bc7a96362d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fbd20f1e059a8a7f95435278b5ac81.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac408a5d33731ec9026a0a0e21d071f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494f173fed024b28d9e2bc7a96362d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fbd20f1e059a8a7f95435278b5ac81.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c58f8c034f39f3d2a3999d71c96913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4b77e77f7b2d0fc8187985a57c9902.png)
⑤若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a90612778afd628ab803cc879654743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d79aa686572fa83f7c3e5c7c3a4da55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
您最近一年使用:0次
10 . 已知函数
的定义域
,值域是
;
定义域
,值域是
.
甲:如果任意
,存在
,使得
,那么
;
乙:如果存在
,存在
,使得
,那么
;
丙:如果任意
,任意
,使得
,那么
;
丁:如果存在
,任意
,使得
,那么
;
请判断上述四个命题中,假命题的个数是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a6a85533f7258ae9879c9e6deb1b4c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9416d7af60ec6bcd4d5c912354e1be0d.png)
甲:如果任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa273c6bf06db59f93c900e6bf8eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bbaa6a36129a8d6b71a284d155ae5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e96640bec5c52d0d21269c83b3a1e89.png)
乙:如果存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa273c6bf06db59f93c900e6bf8eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bbaa6a36129a8d6b71a284d155ae5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5a918bf1e443aeeb7774ad6b9a5281.png)
丙:如果任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa273c6bf06db59f93c900e6bf8eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bbaa6a36129a8d6b71a284d155ae5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5a918bf1e443aeeb7774ad6b9a5281.png)
丁:如果存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa273c6bf06db59f93c900e6bf8eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bbaa6a36129a8d6b71a284d155ae5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5319504bde1a5a36d6f2277b36deef6.png)
请判断上述四个命题中,假命题的个数是
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次