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Homework Help: Linear Algebra

  1. Oct 9, 2013 #1
    1. The problem statement, all variables and given/known data
    Hi, I have a really short (and dumb) question.

    In one of my homework problems they talk about a vector w, such that w=e1+e2+e3. (In R3.)

    3. The attempt at a solution
    I guess they mean that: e1=(1,0,0), e2=(0,1,0) and e3=(0,0,1). So w=(1,1,1). Right?
  2. jcsd
  3. Oct 9, 2013 #2

    Simon Bridge

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    Science Advisor
    Homework Helper

    Sort of. the ei are usually basis vectors, but they do not have to be Cartesian basis vectors.
    Any three orthogonal vectors will do - helps if they are orthonormal.
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