1 . 如图所示,平面内有三个向量
,
,
,
与
的夹角为120°,
与
的夹角为150°,且
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8337706c550bc095d7a2bd872221a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8337706c550bc095d7a2bd872221a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd5acc68e88a56f6c1b01fc6ca2d428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c21f133b919d567cf96cf64cef210b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54247ad0b7bcc3ea751069ae9c8584b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/7d032e20-c717-4c25-b4e7-4696c9767eba.png?resizew=142)
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2 . 如图,在
中,点D为线段BC的中点,点E,F分别是线段AD上靠近D,A的三等分点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ace1f0505dac8a8ea7bca12dc94eb41.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5卷引用:湖南省岳阳市岳阳县第一中学2024届高三下学期4月期中考试数学试题
湖南省岳阳市岳阳县第一中学2024届高三下学期4月期中考试数学试题湖南省岳阳市岳汨联考2023-2024学年高三下学期5月月考数学试题安徽省2023届高三A10联盟二模数学试卷(已下线)押新高考第3题 平面向量(已下线)第01讲 平面向量的概念、线性运算及坐标表示(六大题型)(讲义)
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3 . 在
中,点O满足
,且AO所在直线交边BC于点D,有
,
,
,则
的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14d884f5fa364ef1333de6b915adf76c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8622a2f049ec3782bb8825cff0c311e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf182b6b529e49941299366a9f7eca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be40c200b2b6427acd4665cd37fafeb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d839445c01dc80102befeec1e4fa2250.png)
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湖南省湖湘教育三新探索协作体2022-2023学年高一下学期4月期中联考数学试题(已下线)第9章 平面向量 单元综合检测(难点)-《重难点题型·高分突破》(苏教版2019必修第二册)吉林市第一中学2024届高三高考适应性训练(二)数学试题
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4 . 如图,已知
分别是
的三条中线,
为
的重心,设
为
所在平面上任意一点,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/16/22137ae4-8622-445c-803c-bdcf908d8d6e.png?resizew=153)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c42f73b6b4cd5308071e6bedb83049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/16/22137ae4-8622-445c-803c-bdcf908d8d6e.png?resizew=153)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-04-15更新
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5 . 如图,在四边形ACBD中,AB与CD交于点M,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/893c90eb-d583-4e1a-9852-fc7056db6e44.png?resizew=167)
(1)若
,
,求
,
的值;
(2)若
,
,
,
,求
,
满足的等量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18096ef43cdbf97b8ceef8591bc95473.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/893c90eb-d583-4e1a-9852-fc7056db6e44.png?resizew=167)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d74b1d0480790400a9223e4437afdba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d110bef2b98acae44b406746c4fb04d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b59ab6bf6111dda4a3d428454768b77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae15e5357601ddb7e303b56dbe337145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bdcd23d2c26d9df0b4756d8a715673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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解题方法
6 . 设
为
所在平面内一点,若
,则下列关系中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b630ed14198197588c69bff2cf275b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-04-07更新
|
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6卷引用:湖南省邵东市第一中学2023-2024学年高一下学期第三次月考数学试题
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7 . 如图,在菱形ABCD中,
,
.
![](https://img.xkw.com/dksih/QBM/2023/3/31/3206324326342656/3208729981992960/STEM/7fa32e6177944b98ae9c45e77aa60d81.png?resizew=295)
(1)若
,
,求
;
(2)若菱形
的边长为6,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27d41769e5b0593292ded612c401572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f93eb8467ec408b7def036a40283004.png)
![](https://img.xkw.com/dksih/QBM/2023/3/31/3206324326342656/3208729981992960/STEM/7fa32e6177944b98ae9c45e77aa60d81.png?resizew=295)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c253d5e4d6d6f7db0f32b812e12d88a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/890e2995cd369d0cd52f59e26e6cefd9.png)
(2)若菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3c21714a4b06449a38249c86f8cd1c.png)
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解题方法
8 . 平行四边形
中,
交
于
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caddc2a26579177b871a47f7d3a7f3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97a799c35aa7fb92f0c8287fa016192.png)
A.![]() | B.3 | C.![]() | D.6 |
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2023-04-01更新
|
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9 . 如图所示,在
中,点
是
的中点,过点
的直线分别交直线
、
于不同的两点
、
,若
,
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/328e8ec9120d4f382d63802421770a14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee22c4dcedbfb82454d7ca299a9e24e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd93ee03569849295ebde055410d1b84.png)
A.2 | B.3 | C.![]() | D.5 |
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10 . 下列结论正确的是( ).
A.模等于1个单位长度的向量是单位向量,所有单位向量均相等 |
B.已知平面内的一组基底![]() ![]() ![]() ![]() |
C.已知单位向量![]() ![]() ![]() ![]() ![]() ![]() |
D.已知![]() ![]() ![]() |
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