名校
解题方法
1 . 有下列命题:
①不等式
的解集为
;
②对于实数
,
,
,若
,则
;
③对于实数
,
,
,若
,则
;
④若
,函数
的最小值是
;
⑤当
时,不等式
恒成立,则
的取值范围
;
其中真命题的序号为__ .
(把所有正确答案的序号填写在横线上)
①不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d5d21732d8a22de752d615b46867f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee57417245352ff37564703524651589.png)
②对于实数
![](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/3c22b9d08cf536bbb76bce1b0f135772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
③对于实数
![](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/5842f47b99932df68efbb64eb847e956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411100df59e7a9dc8d4ad77d497b6fa9.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/647e17f9be50dcaba45fa6b15d5d982a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
⑤当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e38f9e9352a21f83b2c1e8f15f95593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1a65d88f9823d49da8f3b96ea9ec6f.png)
其中真命题的序号为
(把所有正确答案的序号填写在横线上)
您最近一年使用:0次
名校
2 . 下列说法中正确的有_______ (填正确说法的序号).
①回归直线
恒过点
,且至少过一个样本点;
②若样本数据
的方差为4,则数据
的标准差为4;
③已知随机变量
,且
,则
;
④若线性相关系数
越接近1,则两个变量的线性相关性越弱;
⑤
是用来判断两个分类变量是否相关的随机变量,当
的值很小时可以推断两个变量不相关.
①回归直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda105ec292aac7ab1485bd5031783fb.png)
②若样本数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce0b4b61f09ac4f5e16b40f7c608402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/044cd011370eb6e1c50f4b701bfe5120.png)
③已知随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90f12392733f7d31b5dadaa7ec2e190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f008a4d0dc886d0138ff98f78686b2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452ac2a59d469cb71f5ef336aa901233.png)
④若线性相关系数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe9be2c6b3d8bf1e6ce9e9c0025ced7.png)
⑤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b986e3613290b456532843d5ad4c6e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b986e3613290b456532843d5ad4c6e67.png)
您最近一年使用:0次
3 . 有下列命题:
①抛物线
的准线方程为
;
②已知直线过两点
,
,则此直线的斜率是
;
③若方程
表示双曲线,则实数
的取值范围是
.
其中正确命题的序号为________ (把正确的答案都填上).
①抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5db63cef6d8bbb08137d71c6f7b6e741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b650820d7bed48ed67a2869ad8c65ff1.png)
②已知直线过两点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aedad6bb70631b944c69f8f0b02b35d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47153fdd73c0661fa460130082e30929.png)
③若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc5494f7d24f95a721555b85c84e8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/127aacea765b09f5110b3176493f0dd2.png)
其中正确命题的序号为
您最近一年使用:0次
名校
解题方法
4 . 复数
满足
,①
;②
;③复数
的虚部为
;④
是方程
在复数范围内的一个解.则以上四个结论中正确序号为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c5bf0ee9e45490fb6503cc88f58d9ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/145e6e8cb3f167d16cdeabd3bd17ca12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a369d595329752492349210d55544d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396df1e2e35bf3040082cbb783314e8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467354a996bf765789a18542f1beb008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48fc19c302085de8a90e2827c32f15e7.png)
您最近一年使用:0次
2022-07-01更新
|
324次组卷
|
2卷引用:天津市西青区2020-2021学年高一下学期期末数学试题
名校
5 . 已知
,
是不重合的两条直线,
,
为不重合的两个平面,给出下列命题:
①若
,
,则
;
②
且
,则
;
③若
,
,则
.
所有正确命题的序号为______ .
![](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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675f1e09eb033dab8ef96d1f1c349150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5bbfcfc23f7a2df2c91fe75b757c306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d07324ee4dec98ce18a2f37728791b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384a65ca1ee3d7d86b988ca34c885e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5bbfcfc23f7a2df2c91fe75b757c306.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675f1e09eb033dab8ef96d1f1c349150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a22374b9b90e04bd0e0e34ece26a89f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
所有正确命题的序号为
您最近一年使用:0次
2020-11-02更新
|
683次组卷
|
4卷引用:天津市宝坻区2020-2021学年高一下学期期末模拟一数学试题
天津市宝坻区2020-2021学年高一下学期期末模拟一数学试题北京二十中2019-2020学年高一下学期期末数学试题(已下线)2.1.3 空间中直线与平面之位置关系-2020-2021学年高一数学课时同步练(人教A版必修2)北京市汇文中学2020-2021学年高一下学期期末数学试题
解题方法
6 . 有下列命题:
①当
,且
时,函数
的图象恒过定点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
②
;
③幂函数
在
上单调递减;
④已知
,
,则
的最大值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
其中正确命题的序号为______ (把正确的答案都填上)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/624d044562db3ec39899fbdf2bc4c597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc6edae66c45841732239fbc5d3cda88.png)
③幂函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd988a227f0bf3744b361558acc4ea8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
④已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3b744c4d7fbaf13e1d4789204f5dae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
其中正确命题的序号为
您最近一年使用:0次
2021-01-20更新
|
340次组卷
|
2卷引用:天津市部分区2020-2021学年高一上学期期末练习数学试题
7 . 在正方体
中,给出以下四个结论:
(1)直线
平面
;(2)直线
与平面
相交;
(3)直线
平面
; (4)平面
平面
.
上述结论中,所有正确结论的序号为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
(1)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd8f61df5729a4a941d7403a047dae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b7b7793d29d66dfdd89e7a6564a35c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96872cd6cd581ae8a861c7032e0257b4.png)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/263d398159c7433838b714a9a75d61e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d32b0fac933ccb4eaa623a9ea1b2b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b7b7793d29d66dfdd89e7a6564a35c.png)
上述结论中,所有正确结论的序号为
![](https://img.xkw.com/dksih/QBM/2019/4/23/2188698964582400/2189492396007424/STEM/6e1d30c125ee40b996e47dca621b1f71.png?resizew=112)
您最近一年使用:0次
2016-12-03更新
|
1796次组卷
|
5卷引用:天津市和平区2017-2018学年高二上学期期中质量调查数学试题
名校
8 . 下列四种说法:
①命题“
,使得
”的否定是“
,都有
”;
②“
”是“直线
与直线
相互垂直”的必要不充分条件;
③过点(
,1)且与函数
图象相切的直线方程是
.
④一个袋子装有2个红球和2个白球,现从袋中取出1个球,然后放回袋中,再取出一个球,则两次取出的两个球恰好是同色的概率是
.
其中正确说法的序号是_________ .
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d3a6268e9eded3dba57ab5d93cf556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51397d3252620200d1bfcccf05711082.png)
②“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0db2c49919467a2e14540f2aabd05cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe3c129a216baf5b233e71c1cb946790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fd61567bbaa3e7509f384c681e2b33.png)
③过点(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fade61dc331031cdc9932aa9e099e2a.png)
④一个袋子装有2个红球和2个白球,现从袋中取出1个球,然后放回袋中,再取出一个球,则两次取出的两个球恰好是同色的概率是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
其中正确说法的序号是
您最近一年使用:0次
2021-01-08更新
|
599次组卷
|
2卷引用:天津市红桥区2020-2021学年高三上学期期末数学试题
9 . 下列说法中
①命题“已知
,若
,则
或
”是真命题;
②命题“若
,则
”的否命题为“若
,则
”;
③若
,则
;
④命题“
”的否定为“
”.
正确说法的序号是___________ .
①命题“已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.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)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1c561b81538ea38deab13478911b89.png)
④命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d2292108bfdd8c5e83be13e85d4d057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24044551b3704214531eb0fb1ba41ce1.png)
正确说法的序号是
您最近一年使用:0次
2018-01-22更新
|
401次组卷
|
3卷引用:天津市河东区2021-2022学年高一上学期期中数学试题
10 . 有以下判断:①
与
表示同一函数;②函数
的图象与直线
的交点最多有1个;③
与
是同一函数;④若
,则
.其中正确判断的序号是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68af49a6c0839e9b8a1e35b44fbc437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4f4e7b93e0162a9f61e96ed588874a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7c7debdf9905b44ff41d808a09d1ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183fa7f80a2e540194a98a4d984fec63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47b865f26068dececc1f1040e1b5cc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a950e2c38979275b031d3e7e003b1df.png)
您最近一年使用:0次