如图所示,在
中D、F分别是BC、AC的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/ed29db07-f2fe-4ab3-a5a0-68c19e736c45.png?resizew=165)
(1)用
,
表示向量
,
;
(2)求证:B,E,F三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4783856c34bc09c95d7420fd4d7ce2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac265febbf99dccf51aa0a2253e61f1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18663288c2245e1febaa003e3b58f56a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/ed29db07-f2fe-4ab3-a5a0-68c19e736c45.png?resizew=165)
(1)用
![](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/1bd98a891fa65f2fc6688001b03185d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/205b7476ab0bad9c1e79ef0c74dbd703.png)
(2)求证:B,E,F三点共线.
更新时间:2022-04-25 15:41:44
|
相似题推荐
解答题-证明题
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适中
(0.65)
解题方法
【推荐1】设
是不共线的两个非零向量.
(1)若
,求证:
三点共线;
(2)若
与
共线,求实数k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
(2)若
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解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】根据要求完成下列问题:
(1)设两个非零向量
,
不共线,如果
,
,
,证明A,B,D三点共线;
(2)设
,
是两个不共线的向量,
,已知
,
,
,若
恒成立,求k的值.
(1)设两个非零向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4330d48848aad9fa26d59516d042bdf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faea619ed35e8c52b295284bfbd4a7a0.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db1612505f2f7f38d1c6fb7d6c48029d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52e576eb4d80b3622bf2affab775699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ff35c6195ccff7a759e7b05e0e3ee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d24632bdcdfffb47173e0064a47af8.png)
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解答题-问答题
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适中
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【推荐3】已知平面内三点
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,
.
(1)若A,B,C三点共线,求n的值;
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02af485e17e7628fd5a3ace6e0a32ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745c82cc6418b182b01a5782e310c149.png)
(1)若A,B,C三点共线,求n的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c9be3ebb6f9980e57d0e8280e99bd52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,在菱形
中,
.
,求
的值;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ebc7c4411836cbb1594cf468aa35f7.png)
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db02d17f0168fbc40c1a0116332fb317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7700cb2566526a121b5dcd25b8d9f10e.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】如图所示,在
中,
,
,
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分别交于点E,F.
,
表示向量
;
(2)设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6db75d7769d4866644abb4e46896d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef86ffd2bf72dcfb82b82f839a35e452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6799b234237333b0efa331d98f0374.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9795568e7c599718a29bc80cc3405233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4fdd03782afd69e06cdd75fb050b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9ebeb198e80f9c2e6406f0601554b92.png)
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