How can I tell if this is a vector space?

In summary, the homework statement is trying to determine whether a set of objects is a vector space under two binary operations. For those that are not vector spaces, the homework fails one of the axioms.
  • #36
hello?? is this helping?
 
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  • #37
you know mathwonk for someone who is apparently so knowledgeable you're pretty clueless. i weep for your students
 

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