March 14th, 2010, 05:05 AM  #1 
Newbie Joined: Feb 2010 Posts: 1 Thanks: 0  Given function, show that
Hello, I can't seem figure out how to do this one. Problem: e^y=e^x+e^x, show that d^2*y/d*x^2+(dy/dx)^2  1=0 I know that I have to find a derivative, but have been failing do it for a few days now. 
March 14th, 2010, 09:31 AM  #2 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,407 Thanks: 859 Math Focus: Elementary mathematics and beyond  Re: Given function, show that
y = ln(e^x + e^x) Can you continue from there? 

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