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I need help with a logarithmic differentiation

  1. Feb 16, 2017 #1
    The Problem: x+y=ln(2+xy) for x=-1 and y=1


    Attempt at Solution: So I started with taking the natural logs of both sides and then differentiating both sides. I don't know if I messed up somewhere along the way but I'm not arriving at the correct answer.

    If anyone can help, I would very much appreciate it.
     
  2. jcsd
  3. May 19, 2017 #2
    You have not said in the question whether you are finding dy/dx or dx/dy and is y a function of x or not? Make your question clearer.
     
  4. May 19, 2017 #3

    Ray Vickson

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    Science Advisor
    Homework Helper

    What is your actual question?
     
  5. May 19, 2017 #4

    Mark44

    Staff: Mentor

    Please, no more replies until the OP comes back to clarify the question. Since the thread is more than three months old, it doesn't seem that this is a burning question for the OP.
     
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