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Inverse of x+2e(x)

  1. Oct 22, 2009 #1
    1. The problem statement, all variables and given/known data

    Let f(x)=x+2e(x). Find the inverse of f(x).

    2. Relevant equations


    3. The attempt at a solution

    Switch y and x so that
    I tried applying ln to the functions at the start, subtracting y and then applying ln, applying ^2 to both sides but nothing seems to come of it. Any first suggestions?
  2. jcsd
  3. Oct 22, 2009 #2


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    There is no "elementary algebra" way to solve that last equation for y.
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