1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Two solutions for same problem dont match ?

  1. Feb 19, 2012 #1
    I was integrating and I noticed that if I integrate one way I get a diff answer than if I integrated another way... My work is in the paint document. I followed all the correct algebraic prodedures I believe... but anyways which one is incorrect?

    Attached Files:

  2. jcsd
  3. Feb 19, 2012 #2


    User Avatar
    Science Advisor
    Homework Helper

    Hii Miike012! :smile:

    Your two solutions are

    x - 6 + 6ln(x - 6) + C

    and x + 6ln(x - 6) + C​

    They're the same!

    (different C :wink:)
  4. Feb 19, 2012 #3
    Your answers are the same.

    If C is an arbitrary constant, then C-6 is also an arbitrary constant.

    (Beaten to the punch by tiny-tim.)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook