已知向量
,
,若
与
反向,则向量
在向量
上的投影向量为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51ea6aa15524cbc86513f0fb1d55375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32885619c79aafdf46f626cd7a88431c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3364e784a01571015bd192d14e3d16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3143307ad0ba4a631eac04e814993655.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2023-08-09 10:48:41
|
相似题推荐
单选题
|
较易
(0.85)
名校
【推荐1】设
,
,
,
,则
是
的( )条件
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e72f6b2ef3329828cb8fc873eeba7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c82ce4d272993473166904617cd059c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ab5529854c3a2e5d3e3f4edff725e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f51dd20f259092ba52c3e62d2c00071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f622a667018a0a1b7b9334909c136090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b958a367fa2f08b6202a5a6ebf5e9f.png)
A.充分不必要 | B.必要不充分 |
C.充要 | D.既不充分也不必要 |
您最近一年使用:0次
单选题
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解题方法
【推荐2】已知向量
,
,且
与
共线,则实数x的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79d05c78e4e03ff3a64b24f272b876b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da45c319a8a244ef2410916d2d50c5ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8827d05338e55f9b60f882d66492ff70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
【推荐1】已知
,
,
,则
在
方向上的投影向量的模为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27cbd3ad4cfa6d2a99a3cf2217f96134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076a5954a138c685a5b2f3ec8205988a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e05c4f81a199d588b81ee7425888769b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
【推荐2】设
为单位向量,
,当
的夹角为
时,
在
上的投影向量为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c984376f5475184e0d3e4f7e1bb65f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29276b43a2950ed71f0f9629a35dfa74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8926cd05c69335e56021799d81ce6728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cbb1eec186a57915e5aced5edce78c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c984376f5475184e0d3e4f7e1bb65f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐3】已知向量
,则
在
方向上的投影向量 为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a6ba2964e935a18d5df10dec50284c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次