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MathGroup Archive 2000

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Re: powersum with a function with variable count of parameters

  • To: mathgroup at smc.vnet.net
  • Subject: [mg25292] Re: powersum with a function with variable count of parameters
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 19 Sep 2000 03:45:15 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <8q22cs$hr0@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Klamser wrote:
> 
> Hi,
> 
> how can I write a function f[x_,xi__]=10^x+10^xi, that returns
> f[1,2,3]->10^1+10^2+10 ^3.
> 
> When i use the above definition, I only get
> 
> 10^1+10^2^3
> 
> But I want to get
> 
> 10^1+10^2+10 ^3
> 
> Regrads, Peter

Hi,

f[expos__] := Plus @@ (10^# & /@ {expos})

Regards
  Jens


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