1 . (1)已知向量
,
满足
,
,且
,求
的坐标.
(2)已知
、
、
,判断并证明以
,
,
为顶点的三角形是否为直角三角形,若是,请指出哪个角是直角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51547fd908ffdae4ba26822ae325b860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66de249b7c29faff4f8ff786ba21d500.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076559f08d17fb25e82886e791719e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4bfa09ce98290508eda68643ee311b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89470068f2cfa4229e471c50065c63ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7089a4e568ed92b1230af589f4d47be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2020-09-05更新
|
401次组卷
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3卷引用:广东省云浮市2019-2020学年高一下学期期末数学试题
广东省云浮市2019-2020学年高一下学期期末数学试题(已下线)6.3.2 平面向量数量积的坐标表示(精练)-2020-2021学年高一数学一隅三反系列(人教A版2019必修第二册)2.6 平面向量的应用 -2020-2021学年高一数学北师大2019必修第二册
13-14高一下·广东云浮·阶段练习
2 . 如图所示,
是
的边
上的中点,记
,
,则向量
( )
![](https://img.xkw.com/dksih/QBM/2014/7/7/1571811002023936/1571811006832640/STEM/5c20a575dd2f43eb93f2ddf9d2d78259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef15fef91468f50529f023f11fc19e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b986c8e8a2b34ab6b6c589ed6cc031e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1ed60cfd259a3c9106d0f25fd67322.png)
![](https://img.xkw.com/dksih/QBM/2014/7/7/1571811002023936/1571811006832640/STEM/5c20a575dd2f43eb93f2ddf9d2d78259.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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