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Homework Help: Simple dot product [inner product] (verification)

  1. Sep 24, 2010 #1
    1. The problem statement, all variables and given/known data
    2v1m3ax.png


    2. Relevant equations

    know dot product

    3. The attempt at a solution
    PART A
    2cr2ij6.png

    PART B
    not sure what's it asking for

    help would be great
     
  2. jcsd
  3. Sep 25, 2010 #2
    Well, what you posted is the answer to the B part actually :wink: Notice the "for all v" part in A. Specific example of u,v does the trick for B, not for A. Hint for A: (u-w)*v = 0 for all v. What does it say about u - w?
     
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