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Homework Help: Calculating the Magnitude of U + V + W

  1. Aug 11, 2015 #1
    1. The problem statement, all variables and given/known data
    U(1, -1, 2)
    V(0, 3, -1)
    W(-1, -1 1)
    Calculate ||(U + V + W)

    2. Relevant equations
    is it as simple as U + V + W then finding out the magnitude of that point.

    3. The attempt at a solution

    For example (U + V) + W
    then the magnitude of that point?
    Last edited: Aug 11, 2015
  2. jcsd
  3. Aug 11, 2015 #2
    As far as I can work out it is right but it just seems too simple.
  4. Aug 12, 2015 #3


    Staff: Mentor

    I think you want |U + V + W|
    These are apparently vectors, not points. And yes, just add the three vectors and then find the magnitude.

    For a vector V = <a, b, c>, |V| = ##\sqrt{a^2 + b^2 + c^2}##.
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