limit

• Subject: limit
• From: leon.magiera at wp.pl
• Date: Wed, 04 Jan 2012 10:55:53 +0100

Hi,

             limit(atan(a*x)-atan(-a*x),x,inf);

Maxima's result  %pi  is correct   only  for a>0 

Best Leon

P.S.
DERIVE returns:    
                            SIGN(a)*PI

Mathematica:
                          Sqrt[a^2]/a*Pi

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