log limit problem

• Subject: log limit problem
• From: Raymond Toy
• Date: Tue, 05 Mar 2013 09:14:58 -0800

>>>>> "joaquin" == joaquin borges <ultradenso at gmail.com> writes:

    joaquin> Hi :
    joaquin> In Maxima built from git on Ubuntu 10.10
    joaquin> esse : (log(x+u)-log(x))/u
    joaquin> limit(esse,u,0) ------> infinity
    joaquin> should be 1/x of course.

I see this too.  If you assume(x>0), then the limit is computed
correctly.  Using tlimit instead of limit gives the desired answer.

I don't know why limit fails in this case.

Ray

• Prev by Date: greek symbols
• Next by Date: Diff and Taylor to return expressions in terms of partial derivatives?
• Previous by thread: log limit problem
• Next by thread: Logo Use
• Index(es):
  • Date
  • Thread