名校
1 . 已知
是单位向量,且
与
垂直,
与
的夹角为135°,则
在
上的投影数量为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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名校
解题方法
2 . 若向量
,
满足
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de31d2760935d346e26016427cec906b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29276b43a2950ed71f0f9629a35dfa74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf342e77c56e55a35bb1151bc215a3a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e021cf35987042fe065cee0f65ded3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de31d2760935d346e26016427cec906b.png)
您最近一年使用:0次
3 . 已知
为椭圆
上一动点,点R满足
且
,则
的最大值是______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d642358726f8f6e6860d60aba204bd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e78f1a9cc4dedc05c175ab99b288b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c25b80e29041b572638d2e05d0feae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b20ecd7c8dacccfe901aa2019f7005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de71d18cfc671252eaa9b8b839d0ccb.png)
您最近一年使用:0次
2023-04-10更新
|
158次组卷
|
2卷引用:宁夏吴忠市吴忠中学2022-2023学年高二下学期期末考试数学(文)试题
名校
解题方法
4 . 已知单位向量
,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11a310e71f78465dc51431270fba1997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9447fce9ea3cb300fdf5f520fd6f78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11a310e71f78465dc51431270fba1997.png)
您最近一年使用:0次
2023-02-16更新
|
1027次组卷
|
4卷引用:宁夏银川市贺兰县第一中学2022-2023学年高一下学期期末考试数学试题
5 . 已知A、B为抛物线
上两点,直线
过焦点F,A、B在准线上的射影分别为C、D,则①
轴上恒存在一点K,使得
;②
;③存在实数
使得
(点O为坐标原点);④若线段
的中点P在准线上的射影为T,有
.中正确说法的序号________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9de36529148d5e73cc4ff68b8f5e3fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d487fe76b23b2accc0b08c5386a987db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c822c3e065399046a64954bda65f7c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e49fd1a2597f67240c9b98f77df71b74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a670efc425a7cef956399d242b883f31.png)
您最近一年使用:0次
名校
6 . 已知
),
,若
,则
在
方向上射影的数量_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8535c7c9560e12bf06101d4d1611d25d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78f1f248ad3e19b367f00e56affeff8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b589263441273a16c8735746a39eb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
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2019-01-25更新
|
602次组卷
|
2卷引用:【全国百强校】宁夏石嘴山市第三中学2019届高三下学期一模考试数学(文)试题
名校
7 . 已知椭圆
的左顶点为M,上顶点为N,右焦点为F,若
,则椭圆的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dffb80ee7ce99d8f87ce8f30f50f7c82.png)
您最近一年使用:0次
2019-01-07更新
|
440次组卷
|
2卷引用:宁夏吴忠中学2020-2021学年高二下学期期中考试数学(文)试题
8 . 已知向量
是单位向量,向量
,若
,则
,
的夹角为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09c2a0e20b944d04545317ca7f8224e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f5aa4764d8d14d5c31f6d9b0d2f17d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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2016-12-04更新
|
720次组卷
|
6卷引用:2016届宁夏六盘山高中高三第二次模拟考试理科数学试卷