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解题方法
1 . 下列命题中,正确的是( )
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若不平行的两个非零向量![]() ![]() ![]() ![]() |
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2022-05-05更新
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326次组卷
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2卷引用:湖北省荆州市石首市2021-2022学年高一下学期期中数学试题
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2 . 已知向量
,
,向量
与向量
的夹角为
,则
=_________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f8ec049c5a608c3f2d3a05534e93c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7bbcb43908eb5cc19338da3b40854b.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/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dde5e69937df2b1e695474098eb5228.png)
您最近一年使用:0次
2019-05-06更新
|
1136次组卷
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2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”2017-2018学年高一下学期期中数学试题
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3 . 如图所示,平行四边形
中,
,
,
分别是
的中点,
为线段
上的一点,且
.
![](https://img.xkw.com/dksih/QBM/2022/4/6/2952461180878848/2953110797451264/STEM/22832d67d7944766ab9636a7482b98d5.png?resizew=236)
(1)以
为基底表示向量
与
;
(2)若
,
,
与
的夹角
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7a93a1399ff7a2bde342652479241b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b54aa2b7f9adf409f0ce8e00615432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc936ca31309f842a5074ff01622c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac31b9badf70a20d3b7d15f72da16d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678851c61127dd37d837d46fc982d6fd.png)
![](https://img.xkw.com/dksih/QBM/2022/4/6/2952461180878848/2953110797451264/STEM/22832d67d7944766ab9636a7482b98d5.png?resizew=236)
(1)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/888afd002858f23a84a8755a002bed7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d8f56ee968049e7c598b5e5c8ab5b1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9936a46cc891744d4600f76bb92b694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b72494c40e9c7afffd5238fd53e2e3b.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/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49343aea9caa0a75dffbd5c43f4f2eca.png)
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2022-04-07更新
|
316次组卷
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2卷引用:湖北省荆州市公安县车胤中学2021-2022学年高一下学期3月月考数学试题
4 . 已知
是圆
:
上两点,点
且
,则
最小值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dbcf0320d94734aedd3d4e2e31b9827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a6fd983cf546a62eb98715814c51d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de79bc7c55e83d9b290fc2a56c5f67da.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-02-12更新
|
885次组卷
|
6卷引用:【百强校】湖北省荆州中学2018-2019学年高二上学期期末考试数学(文)试题
解题方法
5 . 在
中,内角
的对边分别为
,
的角平分线交
于
,
为
的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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6 . 已知两个不共线的向量
的夹角为
,且
,
,若
与
垂直,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6316d995f00623f05fc3d56a6cbe5f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf342e77c56e55a35bb1151bc215a3a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83c5803cc8c05849028a57c4bd4ee72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c786d72d59c2c13ed0f8855f6b5b8a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
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7 . 如图,在
中,已知
为线段
上的一点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/0f34cbcb-00e1-4476-9e1b-fc5cfdba66ab.png?resizew=219)
(1)若
,求
的值;
(2)若
,
,
,且
与
的夹角为
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8189f7b0ffe4d20bf0fad43b4ed589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d093706141016f4e2fde905738cd481e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/0f34cbcb-00e1-4476-9e1b-fc5cfdba66ab.png?resizew=219)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04b85bd0f7ac267188a0ff3c8e6a62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d74987353e90645db6cfa80bf84dce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881e7b6e25cc9b55004a7419adf234cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07293a24cf2d403f59aa43aaacb8e236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911c0a2ab5e2e85f1ad267f41cb96b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794efd8cf0cc386faa170d01f357b1c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b02c4c125ca6b5a01b07aa65121919.png)
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2019-06-21更新
|
948次组卷
|
5卷引用:湖北省荆州市石首一中2020-2021学年高一下学期3月月考数学试题
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8 . 已知
为
内一点且满足
,若
的面积为
且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db07c6ce6c8b0e96a3470c6a3491334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a05a266de6e73486d1c04003321c26ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4fcba0d1c3339be419d0087e70bf62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db07c6ce6c8b0e96a3470c6a3491334.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-05-18更新
|
825次组卷
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4卷引用:湖北省荆州市石首一中2020-2021学年高一下学期3月月考数学试题
湖北省荆州市石首一中2020-2021学年高一下学期3月月考数学试题【全国百强校】重庆南开中学2019届高三第四次教学检测考试数学(理科)试题(已下线)狂刷21 平面向量的综合应用-学易试题君之小题狂刷2020年高考数学(理)福建省福州市福清西山学校2022-2023学年高一下学期5月月考数学试题
9 . 在
中,
是
的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/4/27/2709070190608384/2786247735476224/STEM/f806e7d5-65d6-4262-af78-a83baf05dbd7.png?resizew=315)
(1)求
的面积;
(2)若
为
的角平分线,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66657ffdb8fd7a8ef2f4ac3579437130.png)
![](https://img.xkw.com/dksih/QBM/2021/4/27/2709070190608384/2786247735476224/STEM/f806e7d5-65d6-4262-af78-a83baf05dbd7.png?resizew=315)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99d4c194c1b747e1e62f1727a7efd1f9.png)
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解题方法
10 . 在
中,D、E分别是BC、AC的中点,且
,
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cab770d39414b92f6ddbcc6572a172c.png)
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