在平行四边形ABCD中,点E,F分别在边BC,CD上,且
,
,记
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f010e8072a66a8f1bc73334885b42e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c1631ee2e15496ee2d930eb5b84fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7a93a1399ff7a2bde342652479241b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b54aa2b7f9adf409f0ce8e00615432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f95011066f40e5154b750675e396a0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
22-23高三上·浙江嘉兴·阶段练习 查看更多[3]
更新时间:2022-09-29 22:48:11
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解题方法
【推荐1】在梯形
中,
,且
,点
是
的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12143a06ed24558d8cc7ad39961d3e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ce0da153621bbd05519f168b527e3e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图,在四面体
中,
,D为BC的中点,E为AD的中点,则
可用向量
,
,
表示为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e51e6c6b-03ce-491e-aa7b-c21940286fc0.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd92743eb430725087992635620d8df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b52fad476f828f36de6eb8910497329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e51e6c6b-03ce-491e-aa7b-c21940286fc0.png?resizew=148)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】在如图所示的四边形
中,
,
,点
为边
的中点,则向量
可以表示为( )
![](https://img.xkw.com/dksih/QBM/2021/4/16/2701285113634816/2802812273917952/STEM/9127b21f217143b6a48c73a542c114aa.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e839ac941e8bf536ff35a12e56c7a400.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/87833bb7b9bff8407e7ae4cfef9a9d15.png)
![](https://img.xkw.com/dksih/QBM/2021/4/16/2701285113634816/2802812273917952/STEM/9127b21f217143b6a48c73a542c114aa.png?resizew=135)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐1】在三角形
中,点
在平面
内,且满足
,条件
,条件
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f6a1be8c78e16cd68b0c9bfd833ae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72990fe9620786c3aa60e3e9970211e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1acc8c1d1c41e137d22ed921eb9424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分又不必要条件 |
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【推荐2】在正方形ABCD中,O为两条对角线的交点,E为边BC上中点,记
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183fa80c8ed8b17647e3d7c584edfc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f395693dfb2fedc6417905d2398fe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658ff9921ff96972b0fc95360bb0c65b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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