名校
1 . 已知平面向量
,
满足
,
,
,则
与
的夹角为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d6b6525d0ff5009e6cf3c7f18697de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f2a891c12a5621884ebaef6fba6c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/484f7151a3e814cfc749b373f2f0b5fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
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2020-09-04更新
|
306次组卷
|
3卷引用:湖北省荆州市2019-2020学年高一下学期期末数学试题
名校
2 . 向量
,
,对
,
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a043c2a92cb073dfe7a88f924cb9d89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb385a34be00668a4cd3159e6fddad75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1dd86a99a1f1ace7cd31ffcf8f285ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6be1171cb4cd59d14a26a508099466.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
3 . 若向量
,
满足|
|=1,|
|=2且
⊥
,则|
+
|=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108ea10a57efb9cee06546ed8bf26a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc56f59971bd6f2fae7e76a91174d4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108ea10a57efb9cee06546ed8bf26a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc56f59971bd6f2fae7e76a91174d4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108ea10a57efb9cee06546ed8bf26a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc56f59971bd6f2fae7e76a91174d4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108ea10a57efb9cee06546ed8bf26a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e236e47bcf69cd0b825bc1d111e170.png)
A.9 | B.![]() | C.3 | D.![]() |
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名校
4 . 已知
为单位向量,
,则
的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7b8925a75bc1ef601edb37dbfb9f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d2bb1248ff1123ebc2cb9d7fc16d25.png)
A.1 | B.![]() | C.2 | D.3 |
您最近一年使用:0次
2018-02-13更新
|
816次组卷
|
4卷引用:湖北省荆州中学、宜昌一中等“荆、荆、襄、宜四地七校考试联盟”2018届高三2月联考数学(文)试题1
5 . 已知椭圆
:
的左右焦点分别是
,点
在椭圆
上,
,以原点为圆心,椭圆的短半轴长为半径的圆与直线
相切.
(1)求椭圆
的方程;
(2)若直线
与椭圆
相交于
、
两点,求实数
,使得以线段
为直径的圆经过坐标原点
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f595683f69d5d6b5ca76408b0ff6ff17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ad3b293e70fac19ce4b3e3669e60e05.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffecff6a416ff88fa84767c40919f1b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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6 . 如图,已知平行四边形
中,
,
平面
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59daacb98e9345ffcf0b7bd62b5f97e.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13e08fa9879139881a59f8c90ab2a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386cbb27e9a87c19cb9dd2cde5c4269c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59daacb98e9345ffcf0b7bd62b5f97e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/114d5163-4ee8-4de3-a069-a5bbf9dc6510.png?resizew=153)
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2020-01-20更新
|
238次组卷
|
5卷引用:湖北省荆州中学、宜昌一中两校2019-2020学年高二上学期期末考试数学试题
湖北省荆州中学、宜昌一中两校2019-2020学年高二上学期期末考试数学试题(已下线)必刷卷04-2020年高考数学必刷试卷(新高考)【学科网名师堂】-《2020年新高考政策解读与配套资源》(已下线)卷04-2020年高考数学冲刺逆袭必备卷(山东、海南专用)【学科网名师堂】巩固练09 空间直线、平面的垂直-2020年【衔接教材·暑假作业】新高二数学(2019人教版)海南省海口市第二中学2022-2023学年高二上学期第一次月考数学试题
名校
7 . 平面上三个力F1,F2,F3作用于一点且处于平衡状态,已知|F1|=1 N,|F2|=
N,F1与F2的夹角为45°,则F3的大小为_____ N.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
您最近一年使用:0次
2019-03-28更新
|
291次组卷
|
3卷引用:【校级联考】湖北省荆州中学、宜昌一中等三校2018-2019学年高一3月联考数学试题
9-10高一下·辽宁大连·期末
8 . 设A,B,C,D是空间内不公面的四点,且满足
,
,
,则
是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46a4e894ae759de1877c4d24cd135fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72be83a76b9b60347533fac92b3eb4fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20355d0588b02b173f41edf971e3e7a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
A.钝角三角形 | B.锐角三角形 | C.直角三角形 | D.任意三角形 |
您最近一年使用:0次
2019-01-30更新
|
588次组卷
|
7卷引用:2011年湖北省荆州中学高二上学期期末考试数学理卷
(已下线)2011年湖北省荆州中学高二上学期期末考试数学理卷(已下线)辽宁省大连市长海高中09-10学年高一下学期期末考试数学试题(已下线)2010年辽宁市长海高中高一下学期期末考试数学卷2014-2015学年安徽省马鞍山市二中高二上学期期末考试理科数学试卷甘肃省武威第十八中学人教A版数学选修2-1单元检测:第三章 空间向量与立体几何内蒙古赤峰市宁城县2019-2020学年高二上学期期末数学(理)试题新疆和田地区策勒县2023届高三上学期11月期中教学情况调研数学(理)试题
名校
9 . 若向量
满足:
,且|
|=2,|
|=4,则
与
的夹角是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88aad55b6103d907ad01515f616a0303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
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2020-01-21更新
|
248次组卷
|
3卷引用:2020届湖北省荆州中学、宜昌一中等“荆、荆、襄、宜四地七校高三上学期期末考试数学(文)试题
10 . 已知向量
与
的夹角为
,
,
,当
时,实数
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/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f18996bd00253c3ad9f91780103affb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df42687a73cb92e92a3cb6e54f1edb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68f557aff5fd2009f5b9079af4dc044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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