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Indefinite Integration Calculus

  1. Nov 8, 2011 #1
    1. So I need to solve the following integral


    3. The attempt at a solution
    By double integrating with u-substitution, I got to the following answer: 4+2√x-4ln(2+√x) + C

    I can't find out where I go wrong, cause the answer is 2√x-4ln(2+√x), it has been a while, so maybe the +4 just adds to the constant?

    Thanks in advance guys,
    Last edited by a moderator: Nov 8, 2011
  2. jcsd
  3. Nov 8, 2011 #2


    Staff: Mentor

    Yes, your answer and the official one you showed differ only by a constant, so both are correct.
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