1 . 在锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
中,向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
在向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
上的投影向量为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4a63a8ccd1e8720f5d8321244d3664.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b19819443514c14e3133a657941198.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a3b2d81a5fb15e3ec0e49e570af695c.png)
.
(1)求
t;
(2)已知
D是
BC的中点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8bec51eecf427afb39aa8cc138daeb.png)
,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dcb4dafa2f6d5b155848807b7f13cd8.png)
,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
的值及
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcedbad011278eaeac7c0ee5a4a651f3.png)
.
2022-05-09更新
|
710次组卷
|
3卷引用:山东省青岛市青岛大学附属中学2021-2022学年高一下学期期中数学试题山东省青岛市青岛大学附属中学2021-2022学年高一下学期期中数学试题(已下线)期末押题预测卷03-2021-2022学年高一数学下学期期末必考题型归纳及过关测试(人教A版2019)(已下线)9.3.2-9.3.3 向量的坐标表示和运算 向量平行的坐标表示2-2022-2023学年高一数学《考点·题型·技巧》精讲与精练高分突破系列(苏教版2019必修第二册)
2 . 已知椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda696b103fe853f8fb814f601f080da.png)
,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
相交于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
两点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b74c320db15943bf1e34fc82c71d894.png)
,若椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
恒过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3511cdc6a9b56bc1d9415d3d94ef0f67.png)
,则下列说法正确的是(
)
A.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86624f7635226f3e741e533dd853d712.png) | B.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9359dbc73e1e0191e5f2a8ea5c6ac3a.png) |
C.|AB|的长可能为3 | D.|AB|的长可能为4 |
2024-03-05更新
|
137次组卷
|
1卷引用:山东省青岛市莱西市2024届高三上学期期末教学质量检测数学试题