解题方法
1 . 如图,在平行四边形ABCD中,点E是对角线AC上靠近C的三等分点,点F是CD的中点,设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/12/97a500e7-2f13-4b04-8fed-2becf39714c6.png?resizew=181)
(1)试用
,
分别表示
与
;
(2)利用向量法证明:B,E,F三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7a93a1399ff7a2bde342652479241b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b54aa2b7f9adf409f0ce8e00615432.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/12/97a500e7-2f13-4b04-8fed-2becf39714c6.png?resizew=181)
(1)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b8a2a41a8b50e10d68943e3f0f4e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75fc81977aee721525b4c5625f5a097.png)
(2)利用向量法证明:B,E,F三点共线.
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2022-09-11更新
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2卷引用:广东省部分学校2022-2023学年高一下学期5月统一调研数学试题