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Math Help - Is W a subspace? Just need verification

  1. #1
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    Is W a subspace? Just need verification

    So I have the answers:

    (a) This is not a subspace because it is not closed under both addition and scalar multiplication.

    (b) This is not a subspace because it IS closed under addition but NOT scalar multiplication.


    Am I on the right track? Thanks!
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  2. #2
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    Quote Originally Posted by DarK View Post
    So I have the answers:

    (a) This is not a subspace because it is not closed under both addition and scalar multiplication.


    This is correct but it's enough just one


    (b) This is not a subspace because it IS closed under addition but NOT scalar multiplication.


    This isn't correct: the set is a subspace.

    Tonio




    Am I on the right track? Thanks!
    .
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  3. #3
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    Oh ok, I see what I did wrong. Thank you.
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