设
是定义在区间
上的函数,关于
有下述两个命题:命题
:若“对任意满足
的
,有
”,则
在
上是单调递增函数;命题
:若“对任意满足
的
,有
”,则
在
上是单调递增函数.
则对于命题
与命题
的真假性判断正确的为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ba30f1aa5e75750c67b142fc1d7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243a45670e2b2fe44496d3244ed5a68d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50295dad1b85af259a11a7489a93d74e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580c300d1699fc2145c914a0c99ae585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243a45670e2b2fe44496d3244ed5a68d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
则对于命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
更新时间:2023-01-14 17:52:22
|
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【推荐1】下列说法正确的是
A.“若![]() ![]() ![]() ![]() |
B.“若![]() ![]() |
C.![]() ![]() |
D.“若![]() ![]() |
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【推荐2】下列说法错误的是
A.命题“若![]() ![]() ![]() ![]() |
B.![]() ![]() |
C.若p且q为假命题,则p、q均为假命题 |
D.命题p:“![]() ![]() ![]() ![]() |
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单选题
|
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名校
【推荐1】用反证法证明数学命题时,首先应该做出与命题结论相反的假设,否定“自然数
中恰有一个偶数”时正确的反设为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46d2380152e6efc40909dad0ae96c12.png)
A.自然数![]() | B.自然数![]() |
C.自然数![]() | D.自然数![]() |
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单选题
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适中
(0.65)
【推荐2】设
、
、![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115740991488/STEM/d04e114b897642188d22b9abdf0744ff.png)
,那么关于
、
、
这三个数正确的结论是
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115740991488/STEM/9c2b60ac44244296ba7ec1d33dedfe62.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115740991488/STEM/5edad476afd548299548c6d3c6f0ec6b.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115740991488/STEM/d04e114b897642188d22b9abdf0744ff.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115740991488/STEM/0f57d7789091455cb933609c017bf502.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115740991488/STEM/fc03d0b7801341349f089809e8a96608.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115740991488/STEM/54f6acf94f5a45d6a6050397dbccba67.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115740991488/STEM/06880151427a4073aee43b9397e9815d.png)
A.都不大于2 | B.都不小于2 |
C.至少有一个不大于2 | D.至少有一个不小于2 |
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单选题
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适中
(0.65)
名校
【推荐3】如图,菱形
边长为2,
,
为边
的中点,将
沿
折起,使A到
,且平面
平面
,连接
,则下列结论中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/1ef2c574-1a96-4aca-a5bf-acdc3b9752d5.png?resizew=355)
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c83a968964b21bd831d75905ca1e487.png)
②点
到平面
的距离为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
③异面直线
与
所成角的余弦值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595648b2662f49e0fdd4e36e018ab551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb533463ce90a87902e8d620e6178391.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/1ef2c574-1a96-4aca-a5bf-acdc3b9752d5.png?resizew=355)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c83a968964b21bd831d75905ca1e487.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1530d93834fbafba5f7217778ea90442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
③异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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