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Linear Algebra - dimension of orthogonal complement

  1. Mar 30, 2012 #1
    I've attached a copy of the problem and my attempt at a solution.

    This seems like a relatively straightforward question to me, but my answer seems to be the exact opposite of what the answer key says.

    I reach the conclusion that the answer is C, but the answer is apparently D.

    I'm beginning to think that the answer key is wrong. Can anybody verify my solution?
     

    Attached Files:

  2. jcsd
  3. Mar 30, 2012 #2

    Dick

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    I think your answer key is wrong.
     
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