1 . 如图,在直角梯形
中,
,若
分别是线段
和
上的动点,则
的取值范围是 __________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd63c838924db66d53b8223933d10107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c089a5bea890f9c05fbe6b9024ecb50.png)
![](https://img.xkw.com/dksih/QBM/2017/5/9/1683233427243008/1684040713887744/STEM/40bfb018a6654a3d82c1b900b885ed52.png?resizew=114)
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2017-05-09更新
|
1122次组卷
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6卷引用:江西省新余市第一中学2018-2019学年高一下学期第二次段考数学试题
名校
2 . 已知平面向量
的夹角为
,且
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d194ecefc9101001d88d3cc0bc9d6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b681e1b6c386187a93baf97f759614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a1c7a86e7df9c0b524a400cc1f58a2a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2017-03-31更新
|
1414次组卷
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13卷引用:【校级联考】江西省上饶市横峰中学、铅山一中、余干一中2019届高三上学期第一次联考文科数学试题
【校级联考】江西省上饶市横峰中学、铅山一中、余干一中2019届高三上学期第一次联考文科数学试题【校级联考】江西省上饶市横峰中学、铅山一中、余干一中2019届高三上学期第一次联考理科数学试题江西省萍乡市湘东中学2022届高三上学期开学考试数学试题四川省成都市2017届高三第二次诊断性检测数学文试题河北省衡水中学2017届高三高考押题三卷文数试题辽宁省庄河市高级中学2017届高三第四次模拟考试数学(理)试题辽宁省庄河市高级中学2017届高三第四次模拟考试数学(文)试题河南省豫北豫南名校2018届高三上学期精英联赛数学(理)试题河南省豫北豫南名校2018届高三上学期精英联赛(文)数学试题河南省豫北豫南名校2018届高三上学期精英联赛理数试题河北省衡水中学2018年高考押题(三)文科数学【全国校级联考】河南省豫西名校2017-2018学年高二下学期第二次联考数学(文)试卷【全国校级联考】河南省豫西名校2017-2018学年高二下学期第二次联考数学(理)试题
3 . 设
为
所在平面内一点,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ee284488e3112e1b450a8be8af85319.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/257338afea4cda5d06f4d1a5dd9f77b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c55461def6d339a6cd795920079979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ee284488e3112e1b450a8be8af85319.png)
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4 . 已知
外接圆的圆心为
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021bc0ff7e36c9d6d70ddd2e51e8c04c.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3fdecb73f5ba439872200df144144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021bc0ff7e36c9d6d70ddd2e51e8c04c.png)
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2017-02-08更新
|
645次组卷
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3卷引用:2017届江西吉安市一中高三理上段考二数学试卷
5 . 在直角坐标系
中,已知点
.
(1)若向量
的夹角为钝角,求实数
的取值范围;
(2)若
,点
在
三边围成的区域(含边界)上,
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e624f357767077e634f7786739f98bf.png)
(1)若向量
![](https://img.xkw.com/dksih/QBM/2016/12/14/1619428294352896/1619428294893568/STEM/2f3c71da8fde462c9845c295efd8de31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28965097a2c8f6872accc5ba80f44dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://img.xkw.com/dksih/QBM/2016/12/14/1619428294352896/1619428294893568/STEM/0f0b57c164ca47d2804adfe7f305f5fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72850427e83ff19a24305783e080b280.png)
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6 . 如图,点
为△
的重心,且
,
,则
的值为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9a7b881dd04ffc14380053ae94f259.png)
![](https://img.xkw.com/dksih/QBM/2016/12/2/1573196334628864/1573196340715520/STEM/ce4270606fec465e82859a6c677f956b.png?resizew=149)
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2016-12-05更新
|
769次组卷
|
2卷引用:【全国校级联考】江西省上饶县中学2017-2018学年高一下学期期末考试数学(文)试题
7 . 已知向量
,若
间的夹角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4087f857bf101bf199dd1e391381a24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63619104534f32532cd4ea6d89e83ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69613bda5b1face9751a8c13ae757ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fdb6a60bb99fc9b3b74f53d1b8f6430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4087f857bf101bf199dd1e391381a24.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 已知向量
满足
,且
,则向量
的夹角为
![](https://img.xkw.com/dksih/QBM/2016/11/22/1573165553442816/1573165559422976/STEM/c6010c6dad884175859ce8fcfd06f0b2.png)
![](https://img.xkw.com/dksih/QBM/2016/11/22/1573165553442816/1573165559422976/STEM/c0b7f5335dc9405d83040b3705c4b3b5.png)
![](https://img.xkw.com/dksih/QBM/2016/11/22/1573165553442816/1573165559422976/STEM/2f6ee2251e1f4a78b8825320f3be7332.png)
![](https://img.xkw.com/dksih/QBM/2016/11/22/1573165553442816/1573165559422976/STEM/c6010c6dad884175859ce8fcfd06f0b2.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
9 . 已知向量
与向量
平行,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77caf5dad9b85493b3ddb39b3e81df98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6575461aebc31bc4a13364be90266254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9e31d4524a63074fdac37088160bd9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2016-12-04更新
|
351次组卷
|
5卷引用:江西省七校2020-2021学年高二(常规班)上学期第三次联考数学(文)试题
10 . 已知
,若
,则![](https://img.xkw.com/dksih/QBM/2016/9/20/1573031639203840/1573031645224960/STEM/3d9151f340ec4b8cad3d09c853288b9b.png)
![](https://img.xkw.com/dksih/QBM/2016/9/20/1573031639203840/1573031645224960/STEM/4350ecd4206c496e8dd03d945cb836df.png)
![](https://img.xkw.com/dksih/QBM/2016/9/20/1573031639203840/1573031645224960/STEM/d08a7af411ed4de4aced01efa1f6aa7a.png)
![](https://img.xkw.com/dksih/QBM/2016/9/20/1573031639203840/1573031645224960/STEM/3d9151f340ec4b8cad3d09c853288b9b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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