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Exponential - quadratic equation

  1. Sep 13, 2010 #1
    1. The problem statement, all variables and given/known data

    2n=n2

    2. Relevant equations



    3. The attempt at a solution

    I know the solution is 2 and 4. But I have no idea how to solve it without guessing...
     
  2. jcsd
  3. Sep 13, 2010 #2
    Try looking at the LambertW function :) There's actually a third solution apart from the two you already found, its about -0.767
     
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