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Homework Help: What is the magnitude of the vector

  1. Jan 15, 2009 #1
    1. The problem statement, all variables and given/known data

    what is the magnitude of the vector:

    v = 3i - 4j - k

    2. Relevant equations



    3. The attempt at a solution

    what I have is:

    sqrt(3^2 + (-4)^2 + (-1)^2)

    is this correct?
     
  2. jcsd
  3. Jan 15, 2009 #2

    Mark44

    Staff: Mentor

    Re: vectors

    It's correct, but should be simplified. Carry out the operations in the outer parentheses so that your answer is the square root of a single number.
     
  4. Jan 15, 2009 #3
    Re: vectors

    hmm..the question asks for an exact answer... so should it just be sqrt(26)
     
  5. Jan 15, 2009 #4

    Mark44

    Staff: Mentor

    Re: vectors

    That ***is*** the exact answer.
     
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