名校
1 . 已知向量
,
在
上的投影向量记为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8284d9a2f1fd5de088c436e15500907c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bad299e2782c072d27e1c54422cc8fc.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/6d33ee1f52775bf9ba66e0fdf0ecbb35.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 已知向量
,
.
(1)若
,求实数
的值;
(2)若
,求实数
的值.
(3)求向量
与向量
的夹角余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc4e2320c85265180570f50124eafe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099e8fdebee368995171c2d9e99a1238.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ceea7dcaacdfaa57bc53fa37487224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2fd70805a64e802c158b91382ea44e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3143307ad0ba4a631eac04e814993655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
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3 . 已知向量
.
(1)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45def7b0cfc5c5b4b062ec649f0c7a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
,求实数
;
(2)若向量
与
所成角为锐角,求实数
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283d23df697e933cc60c38935a45fcb6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45def7b0cfc5c5b4b062ec649f0c7a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eeef0e0c8a3060f2749a93aa1ed396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d5d06c8ba359e2f95bd6abbeb9d696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d108e523626be0b40be9b3543ce12524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解题方法
4 . 已知向量
,
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/776e1069609f982ceb0ee978d296d047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc77f4da163cb8800d6a92637912077e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc351bc4b25fb3f311b0df96a7ad5c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbecb94a327b2b5a94f9e686f92a9d37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
A.![]() | B.![]() | C.3 | D.1 |
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解题方法
5 . 设向量
,
,若
与
的夹角为锐角,则实数
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ef4988b025cdf296ea81d7ef05f404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e1882edccb59af98d064e8a89f1b011.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/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
6 . 已知向量
,
,求:
(1)
;
(2)
;
(3)
;
(4)求
与
的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d3f77ab2e6df09f3b549329f1472a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8efa0bd48da7b3c6b5b0d7240a18deeb.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188388083731590d2f1b34d637420f40.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d217ab702812759771efad09e60633.png)
(4)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1afc391105ca04c187e6be5bd77acc78.png)
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7 . 已知平面向量
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089983547e301fbd753a07c4742fa13d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a064389533e4b2d37d787e93701bbea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72306834f286f491a205e2c7a52545da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf0e4f02cab6e9038ff28cab7725ddb8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
8 . 如图,在矩形
中,
,
,点
为
的中点,点
在边
上,若
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8432a7f045008990846be02e1514f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59809f2fa9ce4c833cdf5fe102feb8d8.png)
A.9 | B.10 | C.11 | D.12 |
您最近一年使用:0次
解题方法
9 . 已知向量
,
,则“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d57ab87f0ef7eb9855858221303b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e917d5aa042a7e1acded055579c5181b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02f7d08d10754ff3903d139768f40530.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
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名校
解题方法
10 . 设点
分别为椭圆
的左、右焦点,点
是椭圆
上任意一点,若使得
成立的点恰好是
个,则实数
的值可以是______ .(写出一个正确答案即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4129f43a6af21631251511e63e2ac4b9.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/3e3f19ff9d533161dedf49cf9a921341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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