名校
解题方法
1 . 设向量
为单位向量,且
.
(1)求
与
夹角的大小;
(2)已知向量
,若
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315b3724a637f4631d84a6ebefef8b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88184fcfb8ce5455bacac595683c9d9d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
(2)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197f235556bdd46621a7bd6a76ecc67a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba00b2fd3bfdc8de61d65a71290be0d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
名校
解题方法
2 . 已知
中,过重心G的直线交边
(不含端点)于P,交边(不含端点)
于Q,设
的面积为
,
的面积为
,
,
.
(1)求证:
.
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fbb44c49976c1a07daf42a8df29480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb28dd61871a296ec19e7b6028774a6.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e7aaba80aaeefc1d254e81cd4512d91.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
您最近一年使用:0次
2021-03-30更新
|
2655次组卷
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5卷引用:安徽省六安市舒城中学2021-2022学年高二上学期第一次月考数学试题
名校
3 . 在直角梯形
中,
,
,
,
,点
在线段
上.若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/046a727db439dee32fd0fef0470b069a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2020-03-01更新
|
551次组卷
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3卷引用:安徽省阜阳市第一中学2022-2023学年高二下学期第一次月考数学试题
4 . 已知向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e524c2988704ecc0d41cc9607b4c1c64.png)
(1)若
,求证:
;
(2)若向量
共线,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e524c2988704ecc0d41cc9607b4c1c64.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6778e27ec765abb44b3eeb0f80e20d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb58883caf5c8ca1e94389839d294b6.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e225297418ba60d303578d96116f2e22.png)
您最近一年使用:0次
2018-02-27更新
|
784次组卷
|
4卷引用:安徽省滁州市新锐学校2019-2020学年高二上学期期末数学试题
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