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Let $W = \{ (x,y,z) \in \mathbb{R}^3 : x-y+z=0 \}$.

a) Is $W$ a subspace of $\mathbb{R}^3$?

b) Find a spanning set for $W$. Give a complete geometric description of $W$.

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    Is it me or is asking $b$ completely meaningless if $W$ was not a subspace ?2012-10-02

3 Answers 3