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Re: Different limits for simplied and non-simplified function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg45005] Re: Different limits for simplied and non-simplified function
  • From: "Mukhtar Bekkali" <mbekkali at hotmail.com>
  • Date: Fri, 12 Dec 2003 04:42:31 -0500 (EST)
  • Organization: Iowa State University
  • References: <br4238$j12$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Another example.  Let h=1+v^(1/n) and f=D[h,v].  Then
Limit[Limit[h,v->0],n->0]=1 and Limit[Limit[f,v->0],n->0]=0, but
Limit[Limit[h/f,v->0],n->0]=0.  Isn't it weird? I would expect to get
infinity!


"Mukhtar Bekkali" <mbekkali at hotmail.com> wrote in message
news:br4238$j12$1 at smc.vnet.net...
> I have a function h=1+(n*v)^n-2.  Define r=h/D[h,v] and R=Simplify[r].
Then
> Limit[Limit[r,v->0],n->0]=infinity, while Limit[Limit[R,v->0],n->0]=0.
How
> is this possible, ain't r and R the same thing?
>
>
>



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