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Re: fibonacci question

• To: mathgroup at smc.vnet.net
• Subject: [mg119513] Re: fibonacci question
• From: olfa <olfa.mraihi at yahoo.fr>
• Date: Tue, 7 Jun 2011 06:48:12 -0400 (EDT)
• References: <isfnsl$bu8$1@smc.vnet.net>

On 5 juin, 13:04, Bob Hanlon <hanl... at cox.net> wrote:
> It can verify it
>
> Fibonacci[cn] + Fibonacci[cn + 1] = Fibonacci[cn + 2] // FullSimplify
>
> True
>
> Fibonacci[cn] + Fibonacci[cn + 1] = Fibonacci[cn + 2] //
>   FunctionExpand // Simplify
>
> True
>
> Bob Hanlon
>
> ---- olfa <olfa.mra... at yahoo.fr> wrote:
>
> =============
> Hello Mathematica community,
>
> why FullSimplify[Fibonacci[cn] + Fibonacci[cn + 1]] is not simplified
> into Fibonacci[cn+2]?
> what mathematica function should I use to get this output?
>
> thank you very much for your help.

yes it verify it but I wonder if there is a mean to get it simplified
by mathematica?