(adsbygoogle = window.adsbygoogle || []).push({}); vector space... help!!!!

i just got into vector spaces and i am really stump.

okay from teh definition of vector space, it says something..... "w/ the operation of mult by a number and addition. more briefly, we refer to V as a real vector space."

so from a question from an exercise: determine if the given set constitute a real vector space. in each case the operation of mult by a number and addition are understood to be the usual operation associated w. teh elements of the set.

4)the set of all elements of R^3 w/ first component 0.

i guess i dont understand what vector space at all to answer question 4, can someone explain. i did a search but no luck.

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# Vector space help

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