解题方法
1 . 如图,在边长为2的正方形ABCD中,其对称中心O平分线段MN,且
,点E为DC的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/286b016c6741a04a4ac9cd1756e71f54.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f99c569591750244e9215a55301cefd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/286b016c6741a04a4ac9cd1756e71f54.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/5750dec8-42ae-4d1c-8acd-f6c38cb2d209.png?resizew=180)
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解题方法
2 . 已知菱形
的边长为2,E是
的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414f1461e384dbb56d6fa63456d8213e.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414f1461e384dbb56d6fa63456d8213e.png)
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3 . 已知△ABC满足AB=1,AC=2,
.若E为△ABC内一点,满足
.(
R),且
,延长AE至BC交于点D,则
=_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e5dba31a1738d13c82e1a719b97a343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15168765574b75b64af50f52b9fd458b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8b710ef8c39d3ba74e032a8b7859184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44122db4c07a0ca7cd4aa018b6b7bdd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a92093c1401275685771a2bea47a25.png)
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4 . 设
是两个不共线的向量,且
与
共线,则实数λ=_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111939547e581e8bf029a241b9e9cb05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a363cafd5a1c8a530db4c374493a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb30fd2ae65feabd978409c0288f39ef.png)
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5 . 已知向量
,
,其中
.若
,
共线,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d33ee1f52775bf9ba66e0fdf0ecbb35.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c51e7439ee774cd310628fe003b55a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5264edf002613b158943cb3e793a86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.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/6d33ee1f52775bf9ba66e0fdf0ecbb35.png)
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2020-09-26更新
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6 . 已知
为平面内两个不共线向量,
,
.若M,N,P三点共线,则λ=_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111939547e581e8bf029a241b9e9cb05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9932c02a2ca0231a3ff8baecab58fe92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58ba5ff107287ef66613559cf2d5464.png)
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7 . 平面内有三个点
,
,
,若
,则x的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199fa9ced827133b386d16b8ce3e6ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e88d726b4b2e4b54667da2b5851672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785538e63d01818fc3cc4a5387b86d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544cdd5eb80bad7cf2a2f2ab1003506d.png)
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8 . 在正方形
中,
为线段
的中点,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302e8803c26d7946020e3799ffa3d2c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
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【市级联考】广西南宁市2019届高三毕业班第一次适应性测试数学(理科)试题【市级联考】广西南宁市2019届高三毕业班第一次适应性测试数学(文)试题【市级联考】辽宁省辽阳市2019届高三下学期一模数学(理科)试题(已下线)2.2.3 向量数乘运算及其几何意义-2020-2021学年高一数学课时同步练(人教A版必修4)
9 . 已知向量
,且
,则实数
的值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5a91e6a4b2cd09d8db6caf712bf4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557933d2bd356d4192a89013d61e4630.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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10 . 已知向量
,
,且
,则
与
的夹角等于__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c494307375c589bc8d681e79f2fc37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f2a891c12a5621884ebaef6fba6c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72efa0c5eac27339774289f68fcd93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
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