名校
解题方法
1 . 以下四个命题中错误的序号为__________ .
①已知
三内角A,B,C的对边分别为a,b,c,且
,若角A的平分线交BC于D点,且
,则
的最小值为4
②在平行四边形
中,
,
,若点
,
满足
,
,则
的值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
③设O是
的外心,且满足
,则
.
④在矩形ABCD中,AB=
,BC=2,点E为BC的中点,点F在边CD上,若
=
,则
的值是
①已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58296d4772a7cd31792f6a54e31e18f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ffbcd82b98a9ae69aa4ee28bb49a907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
②在平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1203f93e3696820124f310b51903d6b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e0e0a61bc7aedebcb4a10b423d21e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173118fd038ef312ae3d8dd947f4cd3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b0b73bae90597775a1a9219fdeb1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc724b92355546b4da634b485d042f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
③设O是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ff9d4fdd0d176042505b7aac016852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda3f418a8b01b6d0ab3ed0135fb84a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/706e774dfd32305229cf4e06b36eecc0.png)
④在矩形ABCD中,AB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad28b5f1101403620ddbdbe536a620ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f651a0f32c32d43a5e629e6e3fd479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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名校
解题方法
2 . 设向量
,
,当
,且
时,则记作
;当
,且
时,则记作
,有下面四个结论:
①若
,
,则
;
②若
且
,则
;
③若
,则对于任意向量
,都有
;
④若
,则对于任意向量
,都有
;
其中所有正确结论的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ec6dba44a83ae69146c26a2eec325c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66717aa3e7a771427c1d4433c77a5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7104776ff89344dbad71ae372b2c6a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0988c92311bffdfb634de896a2b2fd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421a7d6f54bf58a7a4f4ce61e06aefa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3e9895c7436c5ea1c3ac47c596c45e.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bd070c2627a2520b0d9047a9835efd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520a520903a0179b3b7ca22c8c08d934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3e9895c7436c5ea1c3ac47c596c45e.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0988c92311bffdfb634de896a2b2fd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ada29fde8bcb4d04ddc6f1d9108cd5d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c004c7cf818feb967b88abca38cf27e9.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0988c92311bffdfb634de896a2b2fd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a55755bb17062042b33d96016491ff.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3e9895c7436c5ea1c3ac47c596c45e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfbdbb27c06740921709722585131fe.png)
其中所有正确结论的序号为( )
A.①②③ | B.②③④ | C.①③ | D.①④ |
您最近一年使用:0次
2024-03-27更新
|
199次组卷
|
4卷引用:吉林省白山市抚松县第一中学2023-2024学年高一下学期5月期中考试数学试题
吉林省白山市抚松县第一中学2023-2024学年高一下学期5月期中考试数学试题河南省商丘市青桐鸣2023-2024学年高一下学期3月月考数学试题(已下线)专题03 向量的数量积-期末考点大串讲(人教B版2019必修第三册)(已下线)【讲】 专题四 与平面向量有关的新定义问题(压轴大全)
3 . 下列说法中错误的序号是_________ (写出所有错误的序号)
①有11名翻译人员,其中5名是英语翻译人员,4名是日语翻译人员,另2人英、日语均精通.现从中选出8人组成两个翻译小组,其中4人翻译英语,另4人翻译日语,则不同选派方法有185种
②用数字0,1,2,3,4,5组成没有重复数字的四位数,将这些四位数按从小到大的顺序排成一个数列,则第145个数字为3210
③四面体的顶点和各棱中点共有10个点,在其中取4个不共面的点,则不同取法共有147种
④若
,则
的值为
①有11名翻译人员,其中5名是英语翻译人员,4名是日语翻译人员,另2人英、日语均精通.现从中选出8人组成两个翻译小组,其中4人翻译英语,另4人翻译日语,则不同选派方法有185种
②用数字0,1,2,3,4,5组成没有重复数字的四位数,将这些四位数按从小到大的顺序排成一个数列,则第145个数字为3210
③四面体的顶点和各棱中点共有10个点,在其中取4个不共面的点,则不同取法共有147种
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde1be9e8053acad7420a18205193477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d151bdb8c5989cc39523fee888e6680b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf3d3564c61e5e9c39a9e2cf2de048b.png)
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