Consider the R-vector space V-R2. Which of the following subsets of V is a subspace? The line 2x+y=1 O The line y = 2x O The circle x²+y²=1 O The set {(x, y) | x ≥ 0 and y ≥ 0}

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A: Thanks for the question :)And your upvote will be really appreciable ;)

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