Q: Determine whether U is a subspace of R^3.(adsbygoogle = window.adsbygoogle || []).push({});

U = {[0 s t]^T | s and t in R}

A: Yes. U = span {[0 1 0]^T, [0 0 1]}

Can someone explain to me how the heck they come up with that answer? Seems so random.

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# Subspaces R^n

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