(adsbygoogle = window.adsbygoogle || []).push({}); Abstract algebra help plz!

I'm not sure if I've posted in the correct forum but I would like some help with the following question:

http://i12.tinypic.com/33mlik6.jpg"

I've to complete this table but I am unsure of how to do the very first step which is to fnd wv.

I am learning this from a book and this is one of the given exercises however it doesn't provide a solution so I am really stuck. Hope someone can help!!

I know the associative law is:

a * ( b * c ) = (a * b) * c

(but I am unsure on how to apply this to my question. Can anyone start me off?)

thanks very much!

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# Abstract algebra help !

**Physics Forums | Science Articles, Homework Help, Discussion**