1. Jun 17, 2016 #1

   Eishan M

   

   Hi,
   What is the inverse of f(x)= e^x + e^-x +1?

    

   Eishan M, Jun 17, 2016
2. 
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3. Jun 17, 2016 #2

   Eishan M

   

   This question has been intimidating me for quite a while. I'm unable to reach a definite conclusion to this. Please help

    

   Eishan M, Jun 17, 2016
4. Jun 17, 2016 #3

   Hawkeye18

   

   Try solving $$e^x+e^{-x}+1=y.$$

    

   Hawkeye18, Jun 17, 2016
5. Jun 17, 2016 #4

   mathman

   

   Science Advisor

   Gold Member

   Convert problem into a quadratic equation by [itex]u=e^x,\ u^2+1+u(1-y)=0[/itex]. Get u as a function of y, then x=ln(u).

    

   mathman, Jun 17, 2016

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