Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Do not get Logarithmic antiderivatives

  1. May 28, 2013 #1
    Dear All,

    the antiderivative of $$\frac{1}{x}$$ is $$ln \vert x \vert $$.
    If I then consider the expression $$ (x-a) ln (\vert x-a\vert)-x $$ and compute the first derivative I obtain $$ ln (\vert x-a \vert)$$.
    If I then consider the equivalent expression $$ (x-a) ln (\vert a -x\vert)-x $$ I do not get the same result, where is my mistake??
     
  2. jcsd
  3. May 28, 2013 #2

    pwsnafu

    User Avatar
    Science Advisor

    We can't answer that unless you show us what answer you got. And your working.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Do not get Logarithmic antiderivatives
  1. On logarithms (Replies: 7)

Loading...