解题方法
1 . 已知命题p:函数
在
上单调递减,命题q:函数
是增函数.若“
”为真命题.求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f724d68178ee026be74a3836f5f290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da3a6d011679952771607b3a166676b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372344eb276ed3d7dcb33e657284ea6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2 . 短道速滑队6名队员(含赛前系列赛积分最靠前的甲乙丙三名队员在内)进行冬奥会选拔,记“甲得第二名”为
,“乙得第二名”为
,“丙得第三名”为
,若
是真命题,
是假命题,
是真命题,则选拔赛的结果为( )
![](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/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d42106a1e81bba7fec300328444a480.png)
A.甲得第一名,乙得第二名,丙得第三名 |
B.甲得第二名,乙得第一名,丙得第三名 |
C.甲得第一名,乙得第三名,丙得第二名 |
D.甲得第一名,乙得第二名,丙得第三名 |
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3 . 已知命题
“
,
”的否定是“
,
”;命题
“
”的一个充分不必要条件是“
”,则下面命题为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72224524016500239feb30151102c2d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e206d77533e131815385c1144ba335fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbff3170097b2d504affee5a0038938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fdbd2503adb779b32f7ceea6723970d.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2021-10-25更新
|
355次组卷
|
6卷引用:河南省焦作市温县第一高级中学2021-2022学年高三上学期10月月考数学(文)试题
4 . 下列叙述中正确的是( )
A.命题“∃x0∈R,2021x02-2x0+1≤0”的否定是“∃x0∈R,2021x02-2x+1>0” |
B.“a2=1”是“直线x+y=0和直线x-ay=0垂直”的充分而不必要条件 |
C.命题“若m2+n2=0,则m=0且n=0”的否命题是“若m2+n2≠0,则m≠0且n≠0” |
D.若p∨q为真命题,p∧q为假命题,则p,q一真一假 |
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5 . 已知命题
;命题
:函数
在区间
上单调递减.其中
为常数.
(1)若
为真命题,求
的取值范围;
(2)若
为真命题,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac327ec64c2f3d456b07c5d2f984609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e53c06c6dca5cfb3997ad5ab27ee858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f99bddac58806e0024a1268378fe53d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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/7516192b6fffc534c940969b238a2833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2021-02-03更新
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6 . 下列选项叙述错误的是( )
A.命题“若![]() ![]() ![]() ![]() |
B.若命题![]() ![]() ![]() ![]() |
C.若![]() |
D.“![]() ![]() |
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2021-01-07更新
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7 . 已知命题
:“
,
”命题
:“
,
”,当命题“
”是真命题,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87008291cdba83461d58dbc9426d777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae262ad13eb5752cf5034569c704c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc8440d57dd0500b1c429561d9661a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/094543346d88c4ed45c1b1fb91f5265b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() | D.![]() |
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8 . 给出两个命题:
:函数
有两个不同的零点;
:若
,则
,那么在下列四个命题中,真命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856e4d0e29bd90636745ba7033faa3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efcf268fb9d95f033c196f72ca517351.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-11-20更新
|
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5卷引用:河南省焦作市温县第一高级中学2021-2022学年高二上学期11月月考理科数学试题
9 . 已知命题
命题
:对于第一象限内的角
,若
,则
.有下列命题:①
;②
;③
;④
.其中真命题的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc872bae657f47721fec656d59cf7bd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90df641ab645927ee577e79faf18dcdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4309296e3e2cfc3fdb6dec665db30c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f602c916a51570813855222577ba372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d1521952e3b3b19cbed055c357db56.png)
A.①② | B.②③ | C.③④ | D.①④ |
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10 . 设命题p:函数f(x)=lg(ax2-x+16a)的定义域为R;命题q:不等式3x-9x<a对任意x∈R恒成立.
(1)如果p是真命题,求实数a的取值范围;
(2)如果命题“p或q”为真命题且“p且q”为假命题,求实数a的取值范围.
(1)如果p是真命题,求实数a的取值范围;
(2)如果命题“p或q”为真命题且“p且q”为假命题,求实数a的取值范围.
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2019-12-16更新
|
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7卷引用:河南省焦作市温县第一高级中学2021-2022学年高二上学期11月月考理科数学试题