13-14高一下·四川资阳·期末
名校
1 . 如图,
的
边长为
,
分别是
中点,记
,
,则
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844515840/STEM/c84dfcef31194835bb0c4c1a41af2c23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce1e07d1031dd1208dca2528f25fb57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1027d1dead0c4e4351a50f45a051caf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63404a6da223146b50ece9918c3a364.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaee68b99d6e767daae1fe065011fcfc.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844515840/STEM/c84dfcef31194835bb0c4c1a41af2c23.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
2016-12-04更新
|
306次组卷
|
3卷引用:上海市上海中学2018-2019学年高二上学期期中数学试题
2 . 已知
是
内一点,且满足
,记
、
、
的面积依次为
,则
等于________ .
![](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/bf963beea63513855e70359c6bf077e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2694c32ca1e120e988012b7ecd74f625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5dbede0ae298e66ca5af37df8754aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b280088a8f97b52c2145bc709434e7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf4e20ea341827ce5f9552daee39462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1627178de6edc574614a630f65775709.png)
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解题方法
3 . 在
中,
,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75bca3d33e20df004b83dcab61392f40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.锐角三角形 | B.直角三角形 |
C.钝角三角形 | D.锐角或钝角三角形 |
您最近一年使用:0次
解题方法
4 . 在
中,
,
,点M是 AB上的动点(包含端点),则
的取值范围为 _____________________
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094986326016/1573094992232448/STEM/8867a6aa59f14646b064c4e7a564e562.png?resizew=45)
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094986326016/1573094992232448/STEM/c5b16fd20c71412580b03c8203055b01.png?resizew=53)
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094986326016/1573094992232448/STEM/9ac6de670b6346f58cd2832c868dd270.png?resizew=49)
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094986326016/1573094992232448/STEM/1a7553e92f194de68de6c1f87ba0f95e.png?resizew=60)
您最近一年使用:0次
2016-12-04更新
|
333次组卷
|
2卷引用:2016-2017学年新疆库尔勒市四中高二上学期分班考试数学(理)试卷
名校
5 . 已知
、
、
为直线
上不同的三点,点
直线
,实数
满足关系式
,有下列结论中正确的个数有 ( )
①
;
②
;
③
的值有且只有一个;
④
的值有两个;
⑤ 点
是线段
的中点.
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1151f8c08cbf023437e179bbeac74132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee21177a6c6f8778f4400f2de3f94165.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c594ce8ea75457957753206eacf5e7.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d40d19588540c14a1fc1a4532146a2.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
⑤ 点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2015-06-04更新
|
542次组卷
|
2卷引用:上海市奉贤中学2018-2019学年高二上学期10月月考数学试题
6 . 已知向量
,
,若向量
的夹角为
,则实数
=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f95b8e7a288aab5ec17d3e39758d180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7e1e48a961b8bd4376e5a3eed7e43b.png)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572234484342784/1572234489987072/STEM/2cde4b97b71c49ec88b3c1b034b33c3a.png)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572234484342784/1572234489987072/STEM/440fcaf024144912a83856edb5825243.png)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572234484342784/1572234489987072/STEM/d08b47717e3d4f2081d0b68b45a29c3b.png)
A.2![]() | B.![]() | C.0 | D.-![]() |
您最近一年使用:0次
名校
7 . 已知
,
,
,则
与
夹角的度数为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3fb441b1aef7942c6caebe7a58de5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fa8ea29001bb1f0c1e5157aff2fca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ba996f653018f51802b36617c0923b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
您最近一年使用:0次
2016-12-03更新
|
719次组卷
|
3卷引用:2014-2015学年广东省揭阳一中高二上学期期末考试文科数学试卷
2014·浙江·一模
8 . 定义
,其中
为向量
与
的夹角,若
,
,
,则
等于
![](https://img.xkw.com/dksih/QBM/2015/1/28/1571972175740928/1571972181409792/STEM/8a611e649d0f4da7b3b732c2a26f82cd.png)
![](https://img.xkw.com/dksih/QBM/2015/1/28/1571972175740928/1571972181409792/STEM/d04169365ab94957b112720eb7d825d9.png)
![](https://img.xkw.com/dksih/QBM/2015/1/28/1571972175740928/1571972181409792/STEM/f5b268b4bd974b6f8df29cb90886d77e.png)
![](https://img.xkw.com/dksih/QBM/2015/1/28/1571972175740928/1571972181409792/STEM/10b80dd20f724db68c7f4cde617d39d3.png)
![](https://img.xkw.com/dksih/QBM/2015/1/28/1571972175740928/1571972181409792/STEM/81a77627a04c480fb5457334f1e1e094.png)
![](https://img.xkw.com/dksih/QBM/2015/1/28/1571972175740928/1571972181409792/STEM/599f9c24f65b451981cc4ce748177f61.png)
![](https://img.xkw.com/dksih/QBM/2015/1/28/1571972175740928/1571972181409792/STEM/15584912bd664cdb9472214cb2b1a6d9.png)
![](https://img.xkw.com/dksih/QBM/2015/1/28/1571972175740928/1571972181409792/STEM/0a26c395a1f64b7ba209585acabe7a0f.png)
A.-60 | B.60 | C.-60或60 | D.6 |
您最近一年使用:0次
名校
9 . 过圆
上一点作切线与
轴,
轴的正半轴交于
两点,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
A.![]() | B.![]() | C.2 | D.3 |
您最近一年使用:0次
2016-11-23更新
|
278次组卷
|
3卷引用:江西省南昌市实验中学2017-2018学年高二上学期期中理科数学试题
10 . 已知O是△ABC所在平面上一点,且
+2
+3
=
,则△OBC和△ABC的面积比为_________
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572118019211264/1572118025109504/STEM/3c9f00d25c554019bc3cb47e8903550d.png?resizew=18)
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572118019211264/1572118025109504/STEM/9e27f6775ee64a5b85fc31ccf08f9c7f.png?resizew=18)
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572118019211264/1572118025109504/STEM/3a52e5f10d4e4477be06b0de0a5fcf73.png?resizew=18)
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572118019211264/1572118025109504/STEM/90a68d5ef58244288998605f5a613e12.png?resizew=10)
您最近一年使用:0次