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Re: fibonacci question


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.mraihi 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.




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