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Homework Help: Substitution for DE

  1. Apr 30, 2014 #1
    1. The problem statement, all variables and given/known data

    Use appropriate substitution to solve the differential equation
    y'/y + lny = sqrt(1-e^x)

    2. Relevant equations

    3. The attempt at a solution

    I thought of trying to substitute y=ux but didn't get any helpful results, any help or hints would be great.
  2. jcsd
  3. Apr 30, 2014 #2
    Hint: y'/y = (ln y)'

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