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Re: Limit Question

• To: mathgroup at smc.vnet.net
• Subject: [mg66459] Re: [mg66452] Limit Question
• From: "Carl K. Woll" <carlw at wolfram.com>
• Date: Sun, 14 May 2006 02:57:38 -0400 (EDT)
• References: <200605130642.CAA08939@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Blimbaum, Jerry CIV NSWC PC wrote:
> Why do these give no output?
> 
> Simplify[Limit[Exp[-a t],t->Infinity],a>0]
> 
> and  same for
> 
> Simplify[Limit[Exp[a t],t->Infinity],a<0]
> 
> thanks...
> 
> Jerry Blimbaum 
> 
> 

Try sticking the assumption inside of Limit:

In[11]:= Limit[Exp[-a t], t -> Infinity, Assumptions -> a > 0]

Out[11]= 0

In[12]:= Limit[Exp[a t], t -> Infinity, Assumptions -> a < 0]

Out[12]= 0

Carl Woll
Wolfram Research

• References:
  • Limit Question
    • From: "Blimbaum, Jerry CIV NSWC PC" <jerry.blimbaum@navy.mil>