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Homework Help: Vector Problem:

  1. Feb 19, 2006 #1
    FInd the number a such that the vector a+b, where a= (a, 1) and b= 2 [E30N] has a magnitude of 4:

    Any help will be greatly appreciated.
  2. jcsd
  3. Feb 20, 2006 #2


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    Do you know the expression magnitude of a vector in terms of its components?
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