已知
为原点,点
,
的坐标分别为
,
,其中常数
,点
在线段
上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20980070432381fbaa224cc1af76ce37.png)
,则
的最大值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1f08e04cf0b6a9afea66ce590ba00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e1f6cf8990c217af7e109120f35cc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eda48853e8bdb7e266370b4e0d5a258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20980070432381fbaa224cc1af76ce37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b68d5d7c63dfd11dd8f72b864f9bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa30ed741a392705561e242d1f47c05.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2016-12-05 02:09:02
|
【知识点】 平面向量的数量积
相似题推荐
单选题
|
较易
(0.85)
【推荐1】已知向量
,则
与
夹角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a09abece1db726f90cd7e7aed9d3151.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3143307ad0ba4a631eac04e814993655.png)
A.![]() | B.![]() | C.![]() | D.1 |
您最近一年使用:0次
单选题
|
较易
(0.85)
解题方法
【推荐2】记
的内角A,B,C的对边分别为a,b,c,设向量
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efd5a5570f8c9bfd683202b211ae06bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857a52b83a3e3eda0dbf6da951ecf8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4d070c5939bb0ec4a9d40d7e3c7d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次