The question I am looking at asks,(adsbygoogle = window.adsbygoogle || []).push({});

Let a be the vector (-1,2) inR^2. Is the set S = { x is inR^2 | x dot a = 0}

a subspace?

--> x and a are vectors...

Can anyone explain how to show this?

I was thinking that since the zero vector is in R^2, this must also be a subspace.

Thank you.

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# Homework Help: Linear algebra, subspace.

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