名校
1 . 已知向量
,
,若
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b511ee1e1ef29ae0d1883ca77ef46b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7ead5fbe487cc16376ecbc37f319eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43cb62f2f1be06ebb39a8cb5e41dad3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.5 | B.3 | C.2 | D.-3 |
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2019-04-18更新
|
413次组卷
|
3卷引用:宁夏回族自治区石嘴山市平罗县平罗中学2018-2019学年高一下学期期中数学(文)试题
名校
2 . 已知向量
,
不共线,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7243360f4c882d1eb259f8ed4e12af2d.png)
(1)若
,求k的值,并判断
,
是否同向;
(2)若
,
与
夹角为
,当
为何值时,
.
![](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/711250468879c6ede518c59c39fee57b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7243360f4c882d1eb259f8ed4e12af2d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f7d9e1aa8cd1450c90724d45b28046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358d896d9eab84c6695ddc25196e6857.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0674386f0d1fcf53da104626f2da95.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/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381a1bf7eff338c251cce42ef8c8145e.png)
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2019-03-26更新
|
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3卷引用:宁夏海原第一中学2020-2021学年高一下学期第二次月考数学试题
名校
3 . 在
中,
,
,若
,点
为线段
的中点,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/493139a1c94288bd86f90066527b63da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e268b5d48f1be920502f98a9b4c709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539ab591dff6464f036cceeb892d27cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb739a4163d10b66b1bf9d202aa9909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3155968f160d577931f3fc5207f68b39.png)
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2019-02-12更新
|
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5卷引用:宁夏吴忠市吴忠中学2022-2023学年高一下学期阶段测试数学试题
名校
4 . 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
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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
5 . 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)
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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
6 . 已知
与
的夹角为
,且
与
垂直,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0621fa39b3e0e9e2ec1010dbb8e979ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccfd81d120348601cd611241d1a5dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ab8433b230b632b7387e856517a214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
您最近一年使用:0次
名校
7 . 已知向量
,且
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141d84e754309a60b744e065ab3346f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771858a79d49469f51b20b89f97da475.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
A.3 | B.1 | C.4 | D.2 |
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2018-04-27更新
|
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7卷引用:【全国市级联考】宁夏石嘴山市2018届高三4月适应性测试(一模)数学(文)试题
8 . 已知向量
,且
,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad39598edda1e942dbdb0b6618e7319b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb58883caf5c8ca1e94389839d294b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2018-04-12更新
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名校
解题方法
9 . 已知向量
与
的夹角是
,且
,若
,则实数
( )
![](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/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0905867e930e717e7b66919e9537462d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07f7b4966faeca9f67c0f0e93c4b21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a30d4ad9b8ece56ded5fa69d9f12b964.png)
A.![]() | B.![]() | C.-2 | D.2 |
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2017-11-18更新
|
639次组卷
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4卷引用:宁夏石嘴山市第三中学2018届高三12月月考数学(理)试题
2012·江苏·一模
名校
10 . 已知向量
,求:
(1)
;(2)
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f34e7e0c8ae4e87238ed2af4bbecef4e.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5fa3de8948f50d1ce79822ff88aa91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142fb1445891481c867a0c4f849a5742.png)
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2017-09-27更新
|
614次组卷
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4卷引用:宁夏六盘山高级中学2022-2023学年高一下学期第一次月考数学试题(甲卷)
宁夏六盘山高级中学2022-2023学年高一下学期第一次月考数学试题(甲卷)(已下线)2012届江苏省苏北四市(徐、连、淮、宿)高三元月调研测试数学试卷黑龙江省齐齐哈尔第八中学2018届高三第二次月考理数试题山东省枣庄市第八中学2019-2020学年高一下学期复学检测数学试题