Pb Limit ArcTan to : - Infinity
- To: mathgroup at smc.vnet.net
- Subject: [mg34624] Pb Limit ArcTan to : - Infinity
- From: "Didier Losfeld" <Didier.Losfeld at hei.fr>
- Date: Thu, 30 May 2002 02:55:04 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Bonjour ,
I do not understand answers of Mathematica :
question 1 : Series [ ArcTan [ x ] , { x , - Infinity , 2 } ]
answer : Pi / 2 - 1 / x + O ( 1 / x ) ^ 3
question 2 : Limit [ ArcTan [ x ] , x -> - Infinity ]
answer : - Pi / 2
The first answer is False , the second answer is correct.
Many thanks in advance.
Didier Losfeld Professor of mathematics ( France )