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Homework Help: Approximate solution for square root of sum of squares

  1. Jun 18, 2012 #1
    1. The problem statement, all variables and given/known data

    If X^2=Sqrt(x1^2+x2^2+x3^2+...)=> X?

    and vice versa
    If X=x1+x2+x3+...=> X^2?


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jun 18, 2012 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    welcome to pf!

    hi mrafiee! welcome to pf! :smile:

    (try using the X2 and X2 buttons just above the Reply box :wink:)

    hint: factor out the largest one (say, x2), and then it's x2(1 + something) :smile:
     
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