1 . 若
是两个非零向量,且
则
与
的夹角的取值范围是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86edd5296945d9f9165d594357d9d3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1c1dd6b13d92f2cc2eef097e14c07c.png)
您最近一年使用:0次
2020-06-15更新
|
569次组卷
|
2卷引用:湖南省怀化市2020届高三下学期6月第三次模拟考试文科数学试题
2 . 在△ABC中,AC⊥AB,AB=2,AC=1,点P是△ABC所在平面内一点,
,且满足
,若
,则2λ+μ的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02dca18ba5469bf96f8bafac95e0bfd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453390e7025f3441795d805dae8edb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39554d60b13945753a93c7a573670ec8.png)
A.![]() | B.5 | C.1 | D.![]() |
您最近一年使用:0次
2019-12-05更新
|
461次组卷
|
2卷引用:湖南省怀化市新博览联考2019-2020学年高三上学期期中数学(理)试题
3 . 在
中,
,
,
是
内部的一点,若
(
表示相应三角形的面积),则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b935580f6c20b82112df78d570a482b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45373166e0a004b3b4d910655d409b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfe1e68ddb261e1b042860a49875139b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ada76179ab6c50a9d3db0466a924fa9.png)
A.![]() | B.![]() | C.9 | D.![]() |
您最近一年使用:0次
4 . 如图,在
中,
为
的中点,
为
上任一点,且
,则
的最小值为______ .
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/e85b3d53bc4c474583bbedbe6c279b4d.png?resizew=45)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/d0cae6089ddd4950ad5abf4a7ebdb746.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/4f6ebbb5124c4b49bb6a8fd797122087.png?resizew=26)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/08266d9af510407fa9708aac57e96872.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/35f9780ba90f4c74aa58d6b6a92e02ae.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/3acae15cf6ba4ef1907071e5027cf2cd.png?resizew=127)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/fe84daccfd7a485aa73144c7fe565f7e.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/36f879b3a5504f29969399fae1788c7b.png?resizew=144)
您最近一年使用:0次