解题方法
1 . 下列说法不正确的是( )
A.若![]() ![]() ![]() |
B.命题![]() ![]() ![]() ![]() |
C.设![]() ![]() ![]() ![]() |
D.若角![]() ![]() ![]() ![]() |
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名校
2 . 命题甲:关于
的不等式
的解集是空集.命题乙:函数
随着
增大
不增大.
(1)若命题甲、命题乙中至少有一个真,求
的取值范围;
(2)求
的取值范围,使命题甲是命题乙的必要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7076d00eed5fdacbc8a06db9b7a5632e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4b90cb10e8beb990d8b10a53cb10a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)若命题甲、命题乙中至少有一个真,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 命题 “
” 是假命题,则实数
的取值范围为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6278dd9154a84178a2540f4a5a42dc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 已知命题p:
,使
;命题q:函数
在区间
上具有单调性.
(1)若命题p和q都是真命题,求实数a的取值范围;
(2)若命题p和q中有且仅有一个是真命题,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61901f0c23f1994acb34bd8c0c793e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b3db6b23ab3f0774d2018b008d5b7ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
(1)若命题p和q都是真命题,求实数a的取值范围;
(2)若命题p和q中有且仅有一个是真命题,求实数a的取值范围.
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5 . 已知
,非空集合
.若
是
的必要条件,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03197d2b4ab12bff8f8acad420f31f6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ae5e9528be43a8f991aa2d89b16bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186dd545182657f1430c8f9d255ec6c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abca1b5be4c987239a87bf03da24b189.png)
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6 . 若命题“关于x的不等式
对一切实数x恒成立”是假命题,则实数m的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12537d1c1e21214c7f039f2850f24f4c.png)
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7 . 已知命题
:关于
的方程
没有实数根;命题
,
.
(1)若命题
为真,求实数
的取值范围;
(2)若
为真命题,
为假命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38af9a9f17beb8b2ac681809622afad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f02b1f14a46e7b784007174401b6f3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b6263f1d9b8e5824edc0b6e9abec2c.png)
(1)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2022-11-06更新
|
164次组卷
|
2卷引用:江苏省无锡市第三高级中学2022-2023学年高一上学期期中数学试题
8 . 设命题
:不等式
成立;命题
:关于
的方程
有两个不相等的负根.
(1)若
是真命题,求实数
的取值范围;
(2)若命题“
或
”为真命题、“
且
”为假命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255b5d8da3d6a722d49b90d14c895406.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831c3990eff0d957ad589b6b07436d4b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2023-08-15更新
|
201次组卷
|
2卷引用:陕西省榆林市府谷县第三中学2020-2021学年高二上学期期中文科数学试题
9 . 已知
:
,
:函数
在
上没有零点.
(1)若
为真命题,求实数
的取值范围;
(2)若
是
成立的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da105ffbaf489e3300464f8c4cf7ed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e50ebd0fa1224aa18e239bac41e345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a84ef38b4e51f2bc2d289982b2b811.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2023-08-15更新
|
173次组卷
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2卷引用:陕西省渭南市韩城市新蕾中学2020-2021学年高二上学期第二次月考检测理科数学试题
2023高三·全国·专题练习
10 . 已知
:
表示焦点在
轴上的椭圆,
:
,
(1)若
是真命题,求
的取值范围;
(2)若
,
都是真命题,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf9b18008f63c6ebd5f374a9a2a38d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29c6a95a1f40c4d55a47b47c86c5637.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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