解题方法
1 . 已知命题p:
R,
0,命题
:
,a
0.
(1)若非p为真,求实数a的取值范围;
(2)若p,q中有一真一假,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0aa9d781436ea046ee072ca8482f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d7c6e42bb06290a48110f0b7828581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1f23058d5504a536e76288a393a449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8273d61c447020382c97e55ca5302004.png)
(1)若非p为真,求实数a的取值范围;
(2)若p,q中有一真一假,求实数a的取值范围.
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2 . 判断下列命题是全称量词命题,还是存在量词命题,并判断它们的真假.
(1)所有有理数都是实数;
(2)
,
.
(1)所有有理数都是实数;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc92d711e3d99efd5f5b16a84812992b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6dff6f577a055c455f9e836641819f3.png)
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解题方法
3 . 已知集合
,集合
.
(1)存在
,使
,
成立,求实数
的值及集合
;
(2)命题
:
,都有
,命题
:
使得
成立.若命题
为假命题,
为真命题,求实数
的取值范围;
(3)若任意的
,都有
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b60fa83e6e0e97c2b8b9cbb0fd114789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083212e693ef467e6bbcdf8b0b00efd8.png)
(1)存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070054c0b4182ab7399ed56925844e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c8c5147899c7281b0233a2ca02e0847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33aa5dc843bf2e3fcab02d3634631cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd170c506a8ce70f550f5751ae016ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48ffdab4e0e1a229ef6cb5fa714cbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9e7c815cc3e20c815f4e0596ba13d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9aa6ecf57fba086c6016f5e9452c831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 设集合
,集合
.
(1)若“
,
”为假命题,求实数m的取值范围;
(2)若
中有只有三个整数,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f831c69d09a14b16d13075bed9bad9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8182307f4dfe72c41d06ab6cdec459.png)
(1)若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3af8af9e2ff357d4e668105da5955c3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
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5 . 命题p:
,
,分别 在下列条件下求实数m的范围,令p为真命题.
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a375fae50ad1b3d14c011673110256fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac671e6d87de2fb5f7ad3aab582866d.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efbb66d7145f604e253fe20b67f386c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc378d312bb86d732e8f3f64d8cc5d0.png)
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6 . 已知命题
,使
,命题
.
(1)写出
;
(2)若命题
、
一真一假,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248d3fb187b56abeb0317dee8ae6a010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5707186257494f1fea86066f2778b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0275b9de255c3c240094f4966029e141.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.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/294f5ba74cdf695fc9a8a8e52f421328.png)
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7 . 已知
“
”,
“
”.
(1)若
为假命题,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/ae089d9dffb6fc4948be34c4e435af41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d021021ef03fe3ef96fca66b84e50b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7def58dda791c231e0b2266dcf7e06.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
8 . 已知命题
:
R,使
为假命题.
(1)求实数
的取值集合
;
(2)设
为非空集合,若
是
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/df03c12741f6ac84b451569c55464ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc7b819439e2667ab0c9ccd17ba4a11b.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0c2ed8d3bf27bee4d379d108aa1a837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
9 . 太原市小店区第一中学校开展数学社团合作学习模式,社团内同学甲给社团内同学乙出题如下:若:“
,
”是假命题,求实数
的取值范围.同学乙略微思考,反过来给同学甲出了一道题:若“
,
”是真命题,求实数
的取值范围,你认为两位同学出的题中的
的取值范围是否相同,
的取值范围是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c5b21eb73ae08e44aa60c5a57b5c54a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5113d30ab2683d433dd92d6c42d2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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10 . 已知命题p:
,
,命题q:
,
,若p为假命题且q为真命题,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72af04b775e56b72ec26b9f30162465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f83dc6b7df55d898713e978c84bfa74.png)
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