1 . 指出下列各题中,
是
的什么条件(在“充分不必要条件”、“必要不充分条件”、“充要条件”、“既不充分也不必要条件”中选出一种作答).
(1)在
中,
,
;
(2)对于实数
、
,
,
且
;
(3)已知
、
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d485db532274c53b11940729841b7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7631fccacc3a4deccb73a5381b1cd81a.png)
(2)对于实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be63b0244d17e20830dc9050aca9b8ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c6be08ef42e641fe9122cd937924c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bbf68714436abcc9a8fdc01bd04895.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cccdff49c3efe6e7a7dbbf69db9319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7941b2ed7d2410b2a6782e28c87d08a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b30e469b90dcf80a9d1c546cc6b0430.png)
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2 . 指出下列各组命题中,
是
的什么条件?
是
的什么条件?
(1)
:
,
:
;
(2)
:两个角相等,
:两个角是直角.
![](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/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c461d76fce244455f2a06b866f8ba500.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
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3 . 已知
,
,p:
,q:
. p是q的什么条件?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a12c0dbd34d7069e88b2b7d6d0e0fd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c1d2f26c8e3b4a8cecc6e8216c1969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d12f112770d6784031b70130fe275449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aafeaa9426b11b8ee2419af59bf5252e.png)
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2019-09-08更新
|
253次组卷
|
5卷引用:湖北鄂州市2018-2019学年度高二期末数学(理科)试题
湖北鄂州市2018-2019学年度高二期末数学(理科)试题(已下线)第一章++常用逻辑用语(基础过关)-2020-2021学年高二数学单元测试定心卷(人教版选修2-1)(已下线)第一章++常用逻辑用语(基础过关)-2020-2021学年高二数学单元测试定心卷(人教版选修1-1)(已下线)2.2+充分条件、必要条件、充要条件(基础练)-2020-2021学年高一数学十分钟同步课堂专练(苏教版2019必修第一册)(已下线)第一章 常用逻辑用语(基础过关)-2020-2021学年高二数学单元测试定心卷(苏教版选修1-1)
4 . 充分条件与必要条件的语言叙述下列结论:
(1)两直线斜率之积
,则两直线垂直;
(2)棱长都相等的四面体是正四面体.
(1)两直线斜率之积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(2)棱长都相等的四面体是正四面体.
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17-18高二·全国·课后作业
5 . 求证:一元二次方程ax2+bx+c=0(a≠0)的两根都大于3,是
的一个充分不必要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4c4e2deb9b5cf58cf728a976dccf1e.png)
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17-18高二·全国·课后作业
6 . 指出下列各组命题中p是q的什么条件,q是p的什么条件,并说明理由.
(1)p:|x|=|y|,q:x=y.
(2)在△ABC中,p:sin A>,q:A>
.
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2016高二·全国·课后作业
7 . 求证:一元二次方程
的两根都大于3是
的一个充分不必要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/807d62d0b5623b3bd3cb285560bf8436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cbf27e16d89129cf5770772c3bd691.png)
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2016高二·全国·课后作业
8 . 求证:一元二次方程
的两根都大于
是
的一个充分不必要条件.
![](https://img.xkw.com/dksih/QBM/2016/10/27/1826272726155264/1826272726474752/STEM/70e6bf68197744feaa58e573d0412461.png)
![](https://img.xkw.com/dksih/QBM/2016/10/27/1826272726155264/1826272726474752/STEM/ea78f86461844889b5704e1c7609fcbe.png)
![](https://img.xkw.com/dksih/QBM/2016/10/27/1826272726155264/1826272726474752/STEM/d776c001600248d1b506d7ef15bb733b.png)
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