解题方法
1 . 平面向量
,
满足
,
,向量
,
的夹角为
,则
的最小值为__________ .
![](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/8f18996bd00253c3ad9f91780103affb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c931b491b90a029b1b6a172257325cd.png)
![](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/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb55c0af0c1295dfc499f31a3e172b2.png)
您最近一年使用:0次
2021-08-09更新
|
132次组卷
|
2卷引用:浙江省衢州市2020-2021学年高二下学期期末数学试题
名校
解题方法
2 . 如图,在
中,
,
,若平面ABC外的点P和线段AC上的点D,线段BC上的点Q,满足
,
,则四面体
的体积的最大值是________ ;当
体积取最大值时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7c56cb3a7babd97511ea58da6979cb.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b755ee4dda4a72063c6fba125720a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d092c7e025551511ce7a5534a8e37f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efcf94c9298a17b826a5f71de5f90f33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7c56cb3a7babd97511ea58da6979cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/45833f49-f740-49d3-bc4e-a215b61d4505.png?resizew=227)
您最近一年使用:0次
3 . 函数
在区间
上的最大值为
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0224851a0cd77f44fdbbe60f927a7a90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f409d09ee4c68dd167d9dc62dd58a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760f804646698060703c5458ff5637c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760f804646698060703c5458ff5637c7.png)
您最近一年使用:0次