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OpenStudy (anonymous):
Determine whether the indicated subset is a subspace of the given Euclidean space R^n - {[x,y,z]}|x,y members of R and z=3x+2} in R^3?
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OpenStudy (beginnersmind):
[0,0,0] is not in the set, so it can't be a subspace.
OpenStudy (anonymous):
Well, that was quite simple actually...I forgot to even look at that..thanks!
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