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Math Help - subspace of R3

  1. #1
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    subspace of R3

    W = {x1}
    {x2}
    { x3}

    x1-x2 = 0

    2x1-3x3 = 4


    I have to determine if each set is a subspace of R3 or not.

    It's supposed to look like a matrix

    <br />
\begin{bmatrix}x1  \\ x2 \\ x3 \end{bmatrix}<br />
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  2. #2
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    I'm thinking the answer is no because the set does not contain (0; 0; 0).
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