Find b & r for Periodic Trajectory of f(x) = r*x/(1+x)^b

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SUMMARY

The discussion centers on finding the values of b and r in the function f(x) = r*x/(1+x)^b that lead to trajectories being attracted to a periodic trajectory. Ljilja seeks a numerical demonstration rather than a theoretical proof. Forum members emphasize the importance of showing effort in problem-solving and suggest that the question may lack sufficient detail, particularly regarding the differential equation context implied by the term "trajectory."

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Ljilja
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Hi all,
I am new to this forum.
My question is:
Find values of b and r for which trajectories are attracted to a periodic trajectory.
The function is:
f(x) = r*x/(1+x)^b

No proofs needed, just a numerical demonstration.


Thanks a lot,
Ljilja
 
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Hiya Ljilja and welcome to the forums,

For future reference we have dedicated homework forums for such questions. In addition, according to the forum guidelines you are required to show some sort of effort in solving the problem yourself.

What are your thoughts?
 
I also presume that the whole question hasn't been stated; ie. the word trajectory (to me) implies a differential equation [tex]\dot{x}=f(x)[/tex]
 

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