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Math Help - Linear Algebra

  1. #1
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    Linear Algebra

    Can someone please help. The question is:
    Determine whether the following subsets of R^4 are subspaces.

    (i) U={(x1,x2,x3,x4)T[x1+x3=0}
    (ii) V= {x1,x2,x3,x4)T[x2+x4=1}

    Thanks in advance.
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  2. #2
    MHF Contributor

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    HINT: Can V contain (0,0,0,0)?
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