如图,在平行四边形
中,点
是
边上的中点,点
是
边上靠近
的三等分点.若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4083158087b388cdebe2ae795237da0f.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4517841b0b403c370067e8b5f4a96ba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32af9914d4ffc495156de334441d712a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4083158087b388cdebe2ae795237da0f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/4cadc38a-4901-40bf-991c-e67d20a3c47b.png?resizew=149)
更新时间:2019-01-25 06:36:45
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适中
(0.65)
【推荐1】如图,已知点
是平行四边形
的中心,过点
作直线与边
及
的延长线分别交于
,若
,
,则
的最小值为___________
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解题方法
【推荐2】在
中,点
满足
,过点
的直线与
,
所在的直线分别交于点
,
,若
,
,则
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08e704292d4c8eef9ff9a634959d95e0.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abd34df1150309cb07ac490e493abf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd63c1b2b44374c2886a4651ccc53779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
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解题方法
【推荐1】在
中,
,若D为BC中点,则
为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5261044963385782a53ffdd79710b5e.png)
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解题方法
【推荐2】已知向量
满足
若对任意实数x都有
,则
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013dd02eae42fe1c343990a1449d2534.png)
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