已知平面向量
,
,
.
(1)若
,求
在
上的投影向量
的坐标;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c43a5977d88d6e6711987af2aaf753c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619858bd5b77aa1c5132446d8ecad1d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2021-04-06 10:10:25
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【推荐2】已知向量
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2eddd1067f72310406b09f19404f478.png)
(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80d769ab21af5365d3c00dc617375ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2eddd1067f72310406b09f19404f478.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afae9db82464afb37d387f6cbedc8139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
解题方法
【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9c730266ecf448c14608e24d37b986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f68f688a0af020ed2aa105a1bcdb52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca88d54ae3b3f4bd45c166686c8735b.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84fdfcaf905273ab758b91a6d7d57de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(Ⅲ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2d55abdab827a57a03165d6b7d93cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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解答题-问答题
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【推荐2】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f18996bd00253c3ad9f91780103affb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03ef3e7fb905b47f36c4630fcc65dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c250094127e2b3c878d68213b60407.png)
(2)当实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa93e6d85e37a5dd4cf2e779080c536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f04039292017b48bb2232442e4511c1.png)
您最近一年使用:0次