解题方法
1 . 已知p:如果数列
是等比数列,那么数列
也是等比数列;q:如果数列
是等差数列,那么数列
也是等差数列.以下哪些为真命题___________ .
①p∧q
②p∨q
③
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3523ba3e007b23175ebc813bc9843510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3523ba3e007b23175ebc813bc9843510.png)
①p∧q
②p∨q
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb9d57cbe246df4aa7b2e12e4aed9ed.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a464aa880b9557686ddf53396129166.png)
您最近一年使用:0次
2023高三·全国·专题练习
2 . 已知全集
,如果命题
,那么
是________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719a1e6a6d75578cea2e7878f00684dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676e4e52efd65057075d80a74724b53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
您最近一年使用:0次
名校
3 . 2021年7月,某文学网站对该网站的数字媒体内容能否满足读者需要进行了调查,调查部门随机抽取了
名读者,所得情况统计如下表所示:
记满分为
分,一般为
分,不满意为
分.设命题
:按分层抽样方式从不满意的读者中抽取
人,则退休族应抽取
人;命题
:样本中上班族对数字媒体内容满意程度的方差为
.
则下列命题中为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01639bca9e56b3a1caf0808e06d49a54.png)
满意程度 | 学生族 | 上班族 | 退休族 |
满意 | ![]() | ![]() | ![]() |
一般 | ![]() | ![]() | ![]() |
不满意 | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a76ae35768783c2ee760259cefd4318.png)
则下列命题中为真命题的是( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-11-09更新
|
418次组卷
|
6卷引用:河南省湘豫名校联盟2021-2022学年高三上学期11月联考文科数学试题
河南省湘豫名校联盟2021-2022学年高三上学期11月联考文科数学试题河南省湘豫名校联盟2021-2022学年高三上学期期中考试(文科)数学试题(已下线)考点53 随机抽样与样本估计总体-备战2022年高考数学典型试题解读与变式(已下线)解密17 统计概率(分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(新高考专用)新疆喀什第六中学2021-2022学年高一12月月考数学试题江西省安义中学等六校2021-2022学年高二上学期期末联考数学(理)试题
4 . 有下列命题:
:幂函数
的定义域为实数集
;
:已知数据
,
,…,
的平均数为
,方差
,则
;
:若
函数的导函数为
,
的解为
,则
为函数
的极值点;
:变量
,
负相关,相关系数为
,则
越大相关性越弱,越小相关性越强.则真命题为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7149a3e582195e80d53797aa163c859c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.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/55cffbfcca9063662cac2626ba5e9abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c85481cd7e94130ef3aa05b4a39e79cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab9db19467c02c2884f7166bcdb8f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20981fbc04f7461658b2921d6812582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b21b872313f7d8c5b606981f954a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbadbb09da422f97c3757082869fa50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc119550ce4fc5f3d1daf996e7243bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de122ae929b1acaff321dec137622ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-05-28更新
|
282次组卷
|
3卷引用:陕西省西安市八校2021届高三下学期第三次联考文科数学试题
陕西省西安市八校2021届高三下学期第三次联考文科数学试题陕西省西安地区八校联考2021届高三下学期高考押题理科数学试题(已下线)专题03 逻辑联结词、全称量词与存在量词-备战2022年高考数学(理)母题题源解密(全国乙卷)