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1 . 下列各结论中,正确的是______ .
①“
为真”是“
为真”的充分不必要条件;
②“
为假”是“
为假”的充分不必要条件;
③“
为真”是“
为假”的必要不充分条件;
④“
为真”是“
为假”的必要不充分条件.
①“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
②“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
④“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
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2022-01-26更新
|
206次组卷
|
2卷引用:宁夏回族自治区银川一中2021-2022学年高二下学期期中考试数学(文)试题
名校
解题方法
2 . 下列说法正确的是__________ (填序号)
(1)已知相关变量
满足回归方程
,若变量
增加一个单位,则
平均增加
个单位
(2)若
为两个命题,则“
”为假命题是“
”为假命题的充分不必要条件
(3)若命题
,
,则
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814cf6a1c32bf49ca31852fba644203c.png)
(4)已知随机变量
,若
,则
(1)已知相关变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9c5c7cffee04e1a5545ea43e6f0f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699fc95c28019d73d664a6fc3744246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
(3)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fbaf82fe2b22d44492a001a7a02466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc75ac0dccb2637afae2efe356da0260.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22fe969dfa44f13d030bcb1b0a55551a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814cf6a1c32bf49ca31852fba644203c.png)
(4)已知随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc1a44ba3f5f763d93aebf2ac41dbf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88abc2cbfe75af19aa96163eef863ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b8036e4288146da2bd38fd586eca92.png)
您最近一年使用:0次
2020-06-15更新
|
496次组卷
|
3卷引用:宁夏吴忠中学2019-2020学年高二下学期期末考试数学(理科)试题
宁夏吴忠中学2019-2020学年高二下学期期末考试数学(理科)试题黑龙江省哈尔滨市第六中学校2019-2020学年高二下学期期中考试数学(理)试题(已下线)8.1.1 变量的相关关系(分层作业)-【上好课】2022-2023学年高二数学同步备课系列(人教A版2019选修第三册)
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3 . “
”是“对任意的正数x,均有
”的________ 条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51e2b8f615b2cc7eca7fda25efb507d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5533d122aeca0cea3a5ac219169ef28.png)
您最近一年使用:0次
4 . 已知复数
,
,则“
”是“z为纯虚数”的______ 条件.(填写“充要”、“充分不必要”、“必要不充分”、“既不充分也不必要”中的一个)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ea57c4dbd42bc66fc949e68dfe1efd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
您最近一年使用:0次
2020-03-26更新
|
103次组卷
|
2卷引用:宁夏贺兰县景博中学2020-2021学年高二上学期第二次月考数学(理)试题
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5 . 下列有关命题的说法正确的是___ (请填写所有正确的命题序号).
①命题“若
,则
”的否命题为:“若
,则
”;
②命题“若
,则
”的逆否命题为真命题;
③条件
,条件
,则
是
的充分不必要条件;
④已知
时,
,若
是锐角三角形,则
.
①命题“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命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b9d5aaaceaa3ac514d17fcfefbf9b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce22028b0472ba0c4db9c3179e963ad2.png)
③条件
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c6b1aa287ff58292b8ca13167a7423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c829d368dd8162aba35c5950d2a9e781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
④已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba6c850df0d8e728fc545044cdd6a0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a673984ab88416f50a8496242427cdbe.png)
您最近一年使用:0次
2019-08-22更新
|
1013次组卷
|
9卷引用:【全国百强校】宁夏石嘴山市第三中学2019届高三上学期期末考试数学(文)试题
【全国百强校】宁夏石嘴山市第三中学2019届高三上学期期末考试数学(文)试题【全国百强校】江苏省清江中学2018届高三学情调研考试数学试题(已下线)专题2 常用逻辑用语(讲)-《2020年高考一轮复习讲练测》(江苏版)(已下线)专题2 常用逻辑用语(练)-《2020年高考一轮复习讲练测》(江苏版)(已下线)专题1.2 命题及其关系、逻辑联结词、充分条件与必要条件-《2020年高考一轮复习讲练测》(浙江版)(练)辽宁师范大学附属中学2018-2019学年高三上学期第一次模块考试数学(理)试题安徽省六安二中河西校区2018-2019学年高三上学期第三次统测文科数学试题甘肃省甘南藏族自治州合作第一中学2018-2019学年高二下学期期末考试数学(文)试题(已下线)黄金卷04(2024新题型)
名校
解题方法
6 . 给出下列命题:①已知
都是正数,且
,则
;
②已知
是
的导函数,若
,则
一定成立;
③命题“
使得
”的否定是真命题;
④
且
是“
”的充要条件;
⑤若实数
,
,则满足
的概率为
,
其中正确的命题的序号是______________ (把你认为正确的序号都填上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e793a22eefbb0c5252b15dac42a0769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9dc8c5db75a8bbdf878ce29dfc274ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d2084957e9796074acba8ba15cc475.png)
③命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68eb5712582fc3e02f660173897919dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce141204a83935f3330a9ab335a7a2d.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a79d7f73b6128650bf7aed538260c72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eeafaa6479bcc807813868a124b56ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e3bbf56c264002fe8afc45a864f5bd.png)
⑤若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6915d4f1cf4364a681af96b603424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06324e4b3e54868878dbdc6ccaaf29ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6982757b5c56f9ad2098913ea4fed3d.png)
其中正确的命题的序号是
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