Thread: 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!

Originally Posted by DarK

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!

.

Oh ok, I see what I did wrong. Thank you.