Re: Problem with Limit
- To: mathgroup@smc.vnet.net
- Subject: [mg12529] Re: Problem with Limit
- From: dwcp <dwcp@mail.nerc-essc.ac.uk>
- Date: Sat, 23 May 1998 18:10:57 -0400
- Organization: ESSC
- References: <6jomfe$k9m@smc.vnet.net>
Hi everyone,
Michel Gosse wrote:
> With mathematica 3.01, the following command :
> Limit[Log[x]/(x-1)^3,x->0,Direction->-1] produce the error message :
> Take::"take":
> "Cannot take positions 1 through 3 in {-1,1} What is wrong ? Is
> this a bug ?
1. It works in Mathematica 3.0 in a Sun SPARCcenter-2000 running SunOS
5.5. Watch:
In[1]:= Limit[Log[x]/(x-1)^3,x->0,Direction->-1]
Out[1]= \[Infinity]
2. You don't need to take this limit, as the denominator is not doing
anything strange as x->0. Watch:
In[11]:= (x-1)^3 /. x->0
Out[11]= -1
Regards,
David.
--
David Pearson, Phone: +44 (0)118 9318741 ESSC,
Fax: +44 (0)118 9316413 University of Reading,
Reading RG6 6AL, Email: dwcp@mail.nerc-essc.ac.uk UK.