Fw: Maclaurin series for ArcCosh[x]

*To*: mathgroup at smc.vnet.net*Subject*: [mg73615] Fw: [mg73581] Maclaurin series for ArcCosh[x]*From*: "fizzy" <fizzycist at knology.net>*Date*: Fri, 23 Feb 2007 04:32:11 -0500 (EST)

This is an interesting question for me for another reason.....my 'favorite' version of Mathematica is still 4.2....I have found many things that work in 4.2 but do not work in 5.2....I have always been meaning to send them to mathgroup but, must admit, I'm too lazy for it.....however, this example here is perfect for the ocassion.... It works in 4.2......interesting also, that the Output in 5.2 for the Series[ ] question, the answer seems different....I havent investigated it further, just want to point out the interesting differences..... Jerry Blimbaum ----- Original Message ----- From: "Andrzej Kozlowski" <akoz at mimuw.edu.pl> To: <mathgroup at smc.vnet.net> Sent: Thursday, February 22, 2007 3:35 AM Subject: [mg73615] [mg73581] Maclaurin series for ArcCosh[x] > Try: > > Series[ArcCosh[x], {x, 0, 11}] > > and now try > > ArcCosh[x] + O[x]^12 > > At least with my version of Mathematica: > > $Version > 5.2 for Mac OS X (February 24, 2006) > > > I do not get the same answer (in fact in the latter case the input is > returned unevaluated). With ArcSinh and any other function that I > have tried in place of ArcCosh the outputs are always the same. > > Andrzej Kozlowski > > > > > >