1 . 已知a、b、c为
的三边长,集合
,
.
(1)若
,求
;
(2)求
的充要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f230edcaa4a6bc34672332588dfd0c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ee85c6468ee8f23539d77901becc8f7.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe167384913cab85ad3f56f697588a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f1ba0a1129741502600e47bf058c98.png)
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20-21高一·江苏·课后作业
2 . 指出下列命题中,
是
的什么条件:
(l)
,
;
(2)
两直线平行,
同位角相等;
(3)
点在角的平分线上,
点到角的两边所在直线的距离相等;
(4)
斜边相等,
两直角三角形全等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(l)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1149929cdb3fb6dbefc2cde0ffcd5e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24665952de1a40539ec5ccb2b4851833.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
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2021高一·全国·专题练习
3 . 下列各题中,试分别指出
是
的什么条件.
(1)
两个三角形相似,
两个三角形全等;
(2)
一个四边形是矩形,
四边形的对角线相等;
(3)
,
;
(4)
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1773bc1d9ffdd0a3cdd585d8fc69bc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8622cac4e81c0503ee0b8213d7f0bcd.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2f40a4c50312b5f18f179020ae1381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdb3a0b54efc98a66580570c989d16f.png)
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名校
4 . 已知函数
的定义域是
.
(1)当
时,求函数
的值域;
(2)设
,
,都有
,若
是
的充分不必要条件,写一个满足题意的集合
并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858681a1b579b3b09227ffcb606391f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac9c64ba837387d640de4b8e2191b1b5.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aba712891b69ac2fde57f3f0696e657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb9aef0ebd8d0ea270570c729f5dc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.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/ac047e91852b91af639feec23a9598b2.png)
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2021-01-30更新
|
611次组卷
|
3卷引用:湖南师范大学附属中学2020-2021学年高一上学期期末数学试题
20-21高一·全国·课后作业
名校
5 . 若集合A={x|x>-2},B={x|x≤b,b∈R},试写出:
(1)A∪B=R的一个充要条件;
(2)A∪B=R的一个必要不充分条件;
(3)A∪B=R的一个充分不必要条件.
(1)A∪B=R的一个充要条件;
(2)A∪B=R的一个必要不充分条件;
(3)A∪B=R的一个充分不必要条件.
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2020-09-08更新
|
271次组卷
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6卷引用:【课时作业】1.4 充分条件与必要条件-2021-2022学年高一数学《新教材同步精典导学案》(人教A版2019必修第一册)
(已下线)【课时作业】1.4 充分条件与必要条件-2021-2022学年高一数学《新教材同步精典导学案》(人教A版2019必修第一册)(已下线)1.2.3+充分条件,必要条件(分层练习,)-新教材2020-2021学年高一数学同步备课(人教B版必修第一册)(已下线)第7课 充分条件、必要条件-2020-2021学年高一数学上学期课时同步练(人教B版2019必修1)河北省大名县第一中学2020-2021学年高一上学期第一次月考数学试题(已下线)1.4.2充要条件-【新教材】人教A版(2019)高中数学必修第一册同步练习(已下线)FHsx1225yl139
6 . 如图,已知矩形
,
,
,
是
上的点,探求存在点
使
的充要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5228da61bed106b28849ef91a2ec116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aada537209e8ab7626e42b17f68907b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18a77f741b7f3553a7fa83e653ac667.png)
![](https://img.xkw.com/dksih/QBM/2020/6/23/2490960556761088/2492385060265984/STEM/05263e2688164a89be5d5ce584199163.png?resizew=212)
您最近一年使用:0次
7 . 举例说明:
(1)p是q的充分不必要条件;
(2)p是q的必要不充分条件;
(3)p是q的充要条件.
(1)p是q的充分不必要条件;
(2)p是q的必要不充分条件;
(3)p是q的充要条件.
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2020-02-06更新
|
779次组卷
|
4卷引用:人教A版(2019) 必修第一册 新高考名师导学 第一章 1.4 充分条件与必要条件
8 . 判断下列各题中,
是否是
的充分条件,
是否是
的必要条件:
(1)
;
(2)
中,
中,
.
![](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)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c30e60be70ba1d51c522217868de6d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd5e3b54df8deb6fe598efa579b77ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553aa8b1095e020358d824e138c82f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6f337c00a6d4bf1e7580d8888db3d6.png)
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2020-02-05更新
|
299次组卷
|
3卷引用:第一章 集合与常用逻辑用语 1.2 常用逻辑用语 1.2.3 充分条件、必要条件
(已下线)第一章 集合与常用逻辑用语 1.2 常用逻辑用语 1.2.3 充分条件、必要条件人教B版(2019) 必修第一册 逆袭之路 第一章 1.2 常用逻辑用语人教B版(2019)必修第一册课本习题习题1-2
9 . 判断下列命题中p是q的什么条件.(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)
(1)p:数a能被6整除,q:数a能被3整除;
(2)
,
;
(3)
有两个角相等,
是正三角形;
(4)若
,
,
;
(5)
,
.
(1)p:数a能被6整除,q:数a能被3整除;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e14a703fe443268e81438d2e6c9eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457185351773eeb5d216b3e8726acbbe.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd5e3b54df8deb6fe598efa579b77ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518c5e4f1d0853a7eaf971669ab40582.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360ff131c51a4ef6745538c18cec92c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5315e893118eda01e9aaa9524475e937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98a8099bfc563236fbe6aeec710a3a6.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd15a98f5f7c568023a3db60c2e1de2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0b801fe7e62610f6427e81b8296770.png)
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2020-02-02更新
|
741次组卷
|
4卷引用:1.4 (整合练)充分条件与必要条件-2021-2022学年高中数学必修第一册课时解读与训练(人教A版2019)
(已下线)1.4 (整合练)充分条件与必要条件-2021-2022学年高中数学必修第一册课时解读与训练(人教A版2019)(已下线)课时1.4 (同步练习)充分条件和必要条件-2021-2022学年高一数学新课学习讲与练精品资源(人教版2019必修第一册)人教A版(2019) 必修第一册 过关斩将 第一章 1.4. 充分条件与必要条件 1.4.1 充分条件与必要条件 1.4.2 充要条件1.4.2 充要条件练习