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Help with domain question with g(f(x))

  1. Sep 11, 2012 #1
    1. The problem statement, all variables and given/known data

    If f(x)=√x and g(x)=√(x^2+1) what is the domain of g(f(x))?

    3. The attempt at a solution

    I cam up with (-∞,+∞) since the square root of a square is always positive, am I missing something here?
  2. jcsd
  3. Sep 11, 2012 #2
    Nevermind, just saw it lol
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