解题方法
1 . (1)
,
,求
.
(2)如图,在平行四边形ABCD中,E是DC上的点,且满足
,记
,
,试以
,
为平面向量的一组基底,用
,
来表示向量
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c0591b372a58045624f2e57489d4dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac0eba16bb810da7e1da72189a75fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ec1ecb70a44b7b61071b2a36667bfb.png)
(2)如图,在平行四边形ABCD中,E是DC上的点,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71692d167f92589f2bd14a092f94c7ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b9d8a08fc52c31cc1a7f527d18b55c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/184359fe3cadc363cf4ebe586c2b3db4.png)
![](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/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f33a112e9728d7b560199765c815f69.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/31/643d4e62-05d1-4c55-9dbf-81ff6539f49a.png?resizew=196)
您最近一年使用:0次
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解题方法
2 . 已知
是坐标原点,
,
(1)求向量
在
方向上的投影向量的坐标和数量投影;
(2)若
,
,
,请判断C、D、E三点是否共线,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1483e8351f585ca23025ec0c46f0a6e.png)
(1)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba0ea537c4145d273b81ada981ee3d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4600168dd0570abb535b7c15af66ddf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b594e00f9aad4faf4907ec01f8112eb5.png)
您最近一年使用:0次
2023-04-27更新
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797次组卷
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2卷引用:黑龙江省大庆实验中学实验二部2022-2023学年高一下学期期中考试数学试题