1 . 在复平面内A,B,C的对应的复数分别为
.
(1)求
;
(2)判定
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b670ee7bbca3249ba9671deaaa696e24.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2989f2dda575a11b7ccb6e212e149892.png)
(2)判定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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6卷引用:甘肃省兰州市教育局第四片区2021-2022学年高一下学期期末考试数学试题
甘肃省兰州市教育局第四片区2021-2022学年高一下学期期末考试数学试题甘肃省兰州市兰州市教育局第四片区2022-2023学年高一下学期期末数学试题复数的概念(已下线)12.3 复数的几何意义(分层练习)-2022-2023学年高一数学同步精品课堂(苏教版2019必修第二册)广东省湛江市第二十一中学2022-2023学年高一下学期期中数学试题(已下线)专题01 复数的概念(题型专练)-《知识解读·题型专练》(人教A版2019必修第二册)
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2 . 已知向量
,则
在
方向上的投影为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5934d51f5c3ff40510399e4e188f13db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73536ab0102bd9da66bfeb7950bb766c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180583e27205ded4602125c8685d04de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-04-04更新
|
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10卷引用:2020届甘肃省天水市第一中学高三上学期第五次模拟数学(文)试题
2020届甘肃省天水市第一中学高三上学期第五次模拟数学(文)试题2020届甘肃省天水市第一中学高三上学期第五次模拟数学(理)试题四川省成都市第七中学2019届高三一诊模拟考试数学(文)试题【全国百强校】四川省成都市第七中学2019届高三第一次诊断性检测数学(文)试题【市级联考】湖南省岳阳市2019届高三第二次模拟考试数学(文)试题(已下线)江西省南昌市进贤一中2019-2020学年高一下学期第一次月考(网上)数学试题2020届辽宁省辽河油田第二高级中学高三4月模拟考试数学(文)试题宁夏自治区银川市银川九中、石嘴山三中、平罗中学三校2020届高三下学期联考数学(文)试题1号卷·A10联盟2022届全国高考第一轮总复习试卷数学(文科)试题(十)1号卷·A10联盟2022届全国高考第一轮总复习试卷数学(理科)试题(九)
3 . 已知四边形ABCD是菱形,点P在对角线AC上(不包括端点A,
C),则
=
C),则
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166711353344/1572166717145088/STEM/f9dc42caea5343cb80629d7e098a8cad.png)
A.λ(![]() ![]() ![]() |
B.λ(![]() ![]() ![]() |
C.λ(![]() ![]() |
D.λ(![]() ![]() |
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4 . 若
,则
等于
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592476282880/1572592482140160/STEM/3cb4c6b2ee234b71a4bd6c12621a8d14.png)
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592476282880/1572592482140160/STEM/2746fac0c31548b78ece9994767700ef.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知两不共线的向量
,
,若对非零实数m,n有m
+n
与
﹣2
共线,则
=
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592476282880/1572592482115584/STEM/aae1c5b8eec844039bf2b8a05b6653ee.png)
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592476282880/1572592482115584/STEM/a23f258398d447c0a473142a3c4f5e77.png)
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592476282880/1572592482115584/STEM/aae1c5b8eec844039bf2b8a05b6653ee.png)
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592476282880/1572592482115584/STEM/a23f258398d447c0a473142a3c4f5e77.png)
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592476282880/1572592482115584/STEM/aae1c5b8eec844039bf2b8a05b6653ee.png)
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592476282880/1572592482115584/STEM/a23f258398d447c0a473142a3c4f5e77.png)
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592476282880/1572592482115584/STEM/1d7164aa9f3243449482bb95bf38aede.png)
A.﹣2 | B.2 | C.﹣![]() | D.![]() |
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6 . 已知在△ABC中,A(2,4),B(﹣1,﹣2),C(4,3),BC边上的高为AD.
(1)求证:AB⊥AC;
(2)求向量
.
(1)求证:AB⊥AC;
(2)求向量
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592476282880/1572592482410496/STEM/7f00fe47f14c4e738196e926f81b663a.png)
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解题方法
7 . 设
为△
的外心,且满足
,则
_____.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3be36c0026c4173faf59ea8f54374aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41db498f025052df2dbb1e50ab672675.png)
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8 . 在四边形
中,如果
,
,那么四边形
的形状是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166711353344/1572166717014016/STEM/cd04860606754d2e9569955a7930244d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f0a29f237bc9c58f13aaacddb2d620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.矩形 | B.正方形 | C.菱形 | D.直角梯形 |
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2016-12-03更新
|
407次组卷
|
2卷引用:2014-2015学年甘肃省武威市六中高一下学期模块终结检测文科数学卷
9 . 若
,则
=______ .
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441484288/STEM/74d3ce60fbcf4ec0bd6ea3ae6de8a067.png?resizew=140)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441484288/STEM/a9dce3996b2b49d0ae795fcef27f0b8b.png?resizew=75)
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10 . 在四边形ABCD中,
=
+2
,
=-4
-
,
=-5
-3
,其中
,![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/fc65722084fd463fb1e9e7da5da86d5c.png)
不共线,则四边形ABCD为.
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/95f9d182c34046fa85284daaa19ba975.png)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/464aadfe1fa949cf84abf05cfb34a19c.png)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/fc65722084fd463fb1e9e7da5da86d5c.png)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/0809fcb840f3473cb989aaee4557e904.png)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/464aadfe1fa949cf84abf05cfb34a19c.png)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/fc65722084fd463fb1e9e7da5da86d5c.png)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/0383a3e907004a03993c7c8b1f74a77c.png)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/464aadfe1fa949cf84abf05cfb34a19c.png)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/fc65722084fd463fb1e9e7da5da86d5c.png)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/464aadfe1fa949cf84abf05cfb34a19c.png)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166435790848/1572166441287680/STEM/fc65722084fd463fb1e9e7da5da86d5c.png)
不共线,则四边形ABCD为.
A.平行四边形 | B.矩形 | C.梯形 | D.菱形 |
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