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1 . 命题“若
,则
”的逆否命题是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d49ec515fb1fdc93ca4dda443326ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fcb77b3bdf39c6c3b6081c8663a6aa.png)
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2019-10-30更新
|
277次组卷
|
6卷引用:河南省平顶山市2019-2020学年高三上学期10月阶段性检测数学(理)试题
2019高二上·全国·专题练习
2 . 下列命题中:①若向量
,
满足
,则
;②若
,则
;③若
,则
,
,
成等差数列;④若
,则
,
,
成等比数列.其中真命题的序号为___________ .
![](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/8c39399675d64e44d8f1058f727b00a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb58883caf5c8ca1e94389839d294b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8201ff29a2091d40eee10db6bbc1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f318dae61e291e3c28eff545f44787.png)
![](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/988b7e964e313579ab8869d67d5be007.png)
![](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)
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3 . 在平面直角坐标系
中,设
为边长为1的正方形内部及其边界的点构成的集合.从
中的任意点P作x轴、y轴的垂线,垂足分别为
,
.所有点
构成的集合为M,M中所有点的横坐标的最大值与最小值之差记为
;所有点
构成的集合为N,N中所有点的纵坐标的最大值与最小值之差记为
.给出以下命题:
①
的最大值为
:②
的取值范围是
;③
恒等于0.
其中所有正确结论的序号是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797a51ae0ecd71820a2355d83b3a734b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b856a39013b618e045f86c3250b0e0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797a51ae0ecd71820a2355d83b3a734b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d22fc9018cd12d96d038b271be600a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32db44fd8efdd888dedbbeb107c601d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afad804e1578c8d3189986c114a091c8.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d22fc9018cd12d96d038b271be600a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70c2a5df6d1ffe74860982183d95e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49fac8ba3fd4c62ec08ed60a2fe44b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d00cba1584f2d1d4f4c73ba7532270.png)
其中所有正确结论的序号是
A.①② | B.②③ | C.①③ | D.①②③ |
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2019-10-22更新
|
110次组卷
|
2卷引用:北京市朝阳区2019~2020学年高三上学期抽样检测数学试题
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4 . 下列命题中,既是真命题又是全称量词命题的是( )
A.至少有一个![]() ![]() |
B.对任意![]() ![]() |
C.![]() |
D.菱形的两条对角线长度相等 |
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2019-10-11更新
|
601次组卷
|
4卷引用:山东省济南市第一中学2019-2020学年高一上学期10月阶段性检测数学试题
山东省济南市第一中学2019-2020学年高一上学期10月阶段性检测数学试题(已下线)专练06 全称量词与存在量词-2021-2022学年高一数学上册同步课后专练(人版A版必修第一册)云南省昆明市官渡区艺卓中学2022-2023学年高一上学期9月月考数学试题山东省滕州市第五中学2022-2023学年高一上学期10月月考数学试题
5 . 命题“
”为__________ 命题(填“真”或“假”),其否定为__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75abca82f71ef1001497a3fd4f04570.png)
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6 . 命题“若
,则
”的否命题是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af3a1e3599964c9d6ca650d500d9d78.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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2019-09-26更新
|
391次组卷
|
2卷引用:重庆市南开中学2020届高三上学期第一次教学质量检测考试数学(文)试题
7 . 下列命题中正确命题的个数是
①“若
,则
”的逆否命题为“若
,则
”;
②“
”是“
”的必要不充分条件;
③若“
”为假命题,则
,
均为假命题;
④若命题
:
,
,则
:
,
.
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a678cd018f89c3518645bc8439805ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31be670d32e753012125c503f2f3be56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d87d0880cedf1b1becc6bcb3a7c3db.png)
②“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f0e9c04402a0ffdaa25c3e3c82c7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb3e3f3a5ee26b44931b0b1a5b4723e3.png)
③若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
④若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2939abf9f1755ea304eeb1e73063cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8324cd30a90a7fa5c80543eb7456ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264dab145ceba44696a6ee63b1e1549d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019高三·全国·专题练习
8 . 命题“若a,b,c成等比数列,则b2=ac”的逆否命题是( )
A.“若a,b,c成等比数列,则b2≠ac” |
B.“若a,b,c不成等比数列,则b2≠ac” |
C.“若b2=ac,则a,b,c成等比数列” |
D.“若b2≠ac,则a,b,c不成等比数列” |
您最近一年使用:0次
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9 . 以下四个命题中,真命题的个数是
①“若
,则
中至少有一个不小于1”的逆命题;
② 存在正实数
,使得
;
③
;
④ 函数
是奇函数,则
的图像关于
对称.
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1a2cbcc1fb41a01668f1808267df4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
② 存在正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a111fd49fdfaf2e32d78732719a0851b.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b712566835342779cd6ee78da5d9c7.png)
④ 函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b727eb9da56be079445321cf61cf26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
A.0 | B.1 | C.2 | D.3 |
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10 . 命题“若
,则
或
”的逆否命题是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0674386f0d1fcf53da104626f2da95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7b54325f484648850d3e9f8cb3209d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7b54325f484648850d3e9f8cb3209d.png)
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