(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[PLAIN]http://img683.imageshack.us/img683/4530/unledkw.jpg [Broken]

can someone please explain why it is not closed under addition???

My textbook did not explain very well, but I understand this can be zero vector and it is closed under scalar multiplication.

thanks!

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Subspace question

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