1 . 设命题
若
,则
或
.那么
的逆否命题为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c34f7fa8ec7ce4a8e99e8ea19d5e687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eeb69dcd17cd8448b0ed90fc02a7f3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
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2 . 下列命题:
①集合
的子集个数有16个;
②定义在
上的奇函数
必满足
;
③
既不是奇函数又不是偶函数;
④
,
,
,从集合
到集合
的对应关系
是映射;
⑤
在定义域上是减函数.
其中真命题的序号是______________ .
①集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bf4032eb5a9ba68131b15182aa3491.png)
②定义在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104375baf5cef5eb92cfc7cf13b80193.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7017ed873e20842a11cd6d7e6c60c68.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/843c3f388a75bf981c11ca947a86e5fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e84710fa14977c09a2f851b83bcb3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c223ceac74e992c1ac4b2c53eb360f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.png)
⑤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ede389b43c78417912542746d91d00.png)
其中真命题的序号是
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3 . 给出下列命题:
①原命题为真,它的否命题为假;
②原命题为真,它的逆命题不一定为真;
③一个命题的逆命题为真,它的否命题一定为真;
④一个命题的逆否命题为真,它的否命题一定为真;
⑤“若
,则
的解集为
”的逆命题.
其中真命题是___________ .(把你认为正确命题的序号都填在横线上)
①原命题为真,它的否命题为假;
②原命题为真,它的逆命题不一定为真;
③一个命题的逆命题为真,它的否命题一定为真;
④一个命题的逆否命题为真,它的否命题一定为真;
⑤“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32361668007b94e213aacf7042792f8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
其中真命题是
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名校
4 . 下列推断错误的个数是
①命题“若
,则
”的逆否命题为“若
则
”
②命题“若
,则
”的否命题为:若“
,则
”
③“
”是“
”的充分不必要条件
④命题“
,使得
”的否定是:“
,均有
”.
①命题“若
![](https://img.xkw.com/dksih/QBM/2016/10/12/1573065985245184/1573065991069696/STEM/e1b49cd705fe4436a7d8757723bd5867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9741a2fca27f76be9834659c28fc6783.png)
![](https://img.xkw.com/dksih/QBM/2016/10/12/1573065985245184/1573065991069696/STEM/741cbf07664f498ab8192c395a475ce9.png)
②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/9741a2fca27f76be9834659c28fc6783.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55cd8b0be2229425e6eaa6c0aed2e062.png)
![](https://img.xkw.com/dksih/QBM/2016/10/12/1573065985245184/1573065991069696/STEM/11a67fcf991f4df7b0f40d69ba0ea438.png)
④命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786921d44625369b0e89c3020f41fb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a44a53f07fb4e9af02564cfea7671dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d05bfb81fb639a2697789174ac6f21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a44a53f07fb4e9af02564cfea7671dc.png)
A.1 | B.2 | C.3 | D.4 |
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5 . 下列判断错误的是
A.“![]() ![]() |
B.命题“![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() |
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6 . 下列说法中错误的个数是
①命题“
有
”的否定是“
有
”;
②若一个命题的逆命题为真命题,则它的否命题也一定为真命题;
③已知
,
,若命题
为真命题,则
的取值范围是
;
④“
”是“
”成立的充分条件.
①命题“
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022847942656/1573022853636096/STEM/cf3a84f13fcf46b28571627b8d33b90a.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022847942656/1573022853636096/STEM/91cf38199ce14f37b33ee669300e3f8a.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022847942656/1573022853636096/STEM/3c84b6b317b3477ea941b061af973678.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022847942656/1573022853636096/STEM/3369890781be40b4b037f6293e0181b2.png)
②若一个命题的逆命题为真命题,则它的否命题也一定为真命题;
③已知
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022847942656/1573022853636096/STEM/a4ad4919beb84a439fef3b1b2a7f8f41.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022847942656/1573022853636096/STEM/f00308096a584aaa9f2c1c593dd3bd28.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022847942656/1573022853636096/STEM/4ba9a9e263234ae380f668f29b069270.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022847942656/1573022853636096/STEM/ccccfe97e22e4ebda30087a5876da587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012f2dde706d1f57011d28f7b090a2ec.png)
④“
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022847942656/1573022853636096/STEM/cef01fa3828c41f59d694d97862491bc.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022847942656/1573022853636096/STEM/91d9e78bebbd4171a57a00b433badd7d.png)
A.1 | B.2 | C.3 | D.4 |
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7 . 下列命题正确的个数为
“
都有
”的否定是“
使得
”
“
”是“
”成立的充分条件
命题“若
,则方程
有实数根”的否命题
“
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022648107008/1573022653997056/STEM/31341fe76948476dad2fdc6658cf9b7a.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022648107008/1573022653997056/STEM/8ecb4d2f2d004af4865e3fd5980ec869.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022648107008/1573022653997056/STEM/0e980fa79a8c4494981b0196f9e1a372.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022648107008/1573022653997056/STEM/db79d43027a74e9caf2ba45f0ab1eacc.png)
“
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022648107008/1573022653997056/STEM/9259d0afdad34305b7b3b00ba41cf60e.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022648107008/1573022653997056/STEM/535a17d364cb4d20ac85a6f8835c5bd6.png)
命题“若
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022648107008/1573022653997056/STEM/1d860e1328c8489380f4a9fe4300fa6d.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022648107008/1573022653997056/STEM/fa735c194e184eeb89ad651301e7d7fa.png)
A.0 | B.1 | C.2 | D.3 |
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8 . 已知命题“若函数
在
上是增函数,则
”,下列结论正确的有______ .
①否命题是“若函数
在
上是减函数,则
”,是真命题
②逆命题是“若
,则函数
在
上是增函数”,是真命题
③逆否命题是“若
,则函数
在
上是减函数”,是真命题
④逆否命题是“若
,则函数
在
上不是增函数”,是真命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2811f486076edd7e1940ab4b273fc4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347c62b44fae618a37c145b3b5d1f1db.png)
①否命题是“若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2811f486076edd7e1940ab4b273fc4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
②逆命题是“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347c62b44fae618a37c145b3b5d1f1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2811f486076edd7e1940ab4b273fc4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
③逆否命题是“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2811f486076edd7e1940ab4b273fc4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
④逆否命题是“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2811f486076edd7e1940ab4b273fc4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
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6卷引用:2015-2016学年山西省怀仁一中高二下期中理科数学试卷
2015-2016学年山西省怀仁一中高二下期中理科数学试卷(已下线)2019高考备考一轮复习精品资料 【文】专题二 命题及其关系 教学案(已下线)2019高考备考一轮复习精品资料 【理】 专题二 命题及其关系、充分条件与必要条件 教学案(已下线)2019高考热点题型和提分秘籍 【理数】专题2 命题及其关系、充分条件与必要条件 (教学案)(已下线)2019高考热点题型和提分秘籍 【文数】专题2 命题及其关系、充分条件与必要条件 (教学案)吉林省长春市九台区第四中学2019-2020学年高二上学期期末考试数学(理科)试题
名校
9 . 已知命题p:指数函数y=(1-a)x是R上的增函数,命题q:不等式ax2+2x-1>0有解.若命题p是真命题,命题q是假命题,求实数a的取值范围.
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10 . 下列四个命题:
①“若xy=0,则x=0且y=0”的逆否命题;②“正方形是菱形”的否命题;③若
;④“若tana=tanb,则a=b”的逆命题;.其中真命题为_______________ (只写正确命题的序号).
①“若xy=0,则x=0且y=0”的逆否命题;②“正方形是菱形”的否命题;③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0768764cb3fb0383a24ae04ad6dd358.png)
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