已知梯形
中,
,
是
边上一点,且
.当
是
中点时,x+y=_________;当
在
边上运动时,x+y的最大值是_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2015/6/4/1572118990372864/1572118995992576/STEM/ff086d5e1ea349fbb6fcbb4b561a8b0f.png?resizew=137)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2015/6/4/1572118990372864/1572118995992576/STEM/4e85caff3fb345638c70d9100bdb6e2a.png?resizew=119)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
更新时间:2016-12-03 13:47:11
|
【知识点】 平面向量的应用举例
相似题推荐
填空题-单空题
|
适中
(0.65)
名校
【推荐1】已知
中
,且
,则
的取值范围是__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d034c01d2dc067d3cac5fae15ffcd6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898d901e6a90edf9f381e93bef677377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f4ccd068d25bcab2591e70617eb6113.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐2】在
中,角A,B,C所对的边分别为
,
,
,
为
的外接圆,
,给出下列四个结论:
①若
,则
;
②若P在
上,则
;
③若P在
上,则
的最大值为2;
④若
,则点P的轨迹所对应图形的面积为
.
其中所有正确结论的序号是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e1bd4f72b3edd9647378d1191857fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c0d9a3528b2f78a30afc3a8ad7ed2e.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821fa0301d20076ad2e541f8c4a86231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab3b7abd49187243f54931a8e2ae3e7.png)
②若P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2c545a5e92b066cb21323367640090.png)
③若P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2efbf5b18492c75432b0b0189df7262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
其中所有正确结论的序号是
您最近一年使用:0次