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[几何] 又谈零向量!

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敬畏数学 posted 2016-11-21 21:48 |Read mode
零向量有多少个,是唯一,还是无数个!
无数个,因为向量由其长度和方向确定.(0,0)又是什么意思!不是唯一的吗?

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力工 posted 2016-11-24 21:04
回复 1# 敬畏数学


    唯一啊。

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Infinity posted 2016-11-25 13:31
回复 1# 敬畏数学


    无数个,长度确定为零,但方向是无数个(因为与任何非零向量都垂直)。

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realnumber posted 2016-11-26 09:09
1楼也是无数个,因为有前天的你和昨天的你.因为有困惑的你和XX的你.

话说这些没那么重要吧,到底是碰到什么问题,才需要这样的答案?

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hbghlyj posted 2024-10-29 04:44
敬畏数学 发表于 2016-11-21 13:48
零向量有多少个,是唯一,还是无数个!
7 年前 MSE 提过的一个完全相同的问题:Proving that the zero vector is unique

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