已知向量
,
.
(1)计算:
;
(2)把满足
,
的向量
,
用
,
表示出来.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d671dba1d939f9a5c2f0f550a6c90b27.png)
(2)把满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc1e1d65fe2cf0277c4b05701110101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f289b5300f8c15768700fdc5ee81a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
更新时间:2021-09-08 08:40:53
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解答题-问答题
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较易
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解题方法
【推荐1】如图,已知平行四边形ABCD的边BC,CD的中点分别是K,L,且
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f15c5d7c51e86c16339e43388dc7a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/391e2a9f97394ab8b8b081b71cb236eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2868a9fe011f56a80c9d1a8ee4604d59.png)
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您最近一年使用:0次
解答题-问答题
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较易
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解题方法
【推荐2】已知O为平行四边形
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/198f224fd666e34ebc90b27cee1c2438.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0762365cf0afd8d6966d7d3407e2ade0.png)
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
【推荐3】平面内三个向量
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6569e50f43b3d8645652ecc13b62066e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eddbbab37f208b0cbbd5caa08840490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0505bb344f07a32a6966ff2583c80e10.png)
(1)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa56fb896d0c3a9a377c10d3b52afcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec655f610928ca21831e26645a21e99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec655f610928ca21831e26645a21e99c.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61061405ac75f4f9db1836b44bd839f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c8bec36916abf7f28d8f09e57ead83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
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