0
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Can't see anything wrong with this:

sol4 = RSolveValue[{a[n + 1] - 1.2*a[n]*(1 - a[n]) == 0, a[1] ==0.1}, 
  a[n], n]

But I just get an echo from Mathematica

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  • $\begingroup$ "an echo from Mathematica" - that usually means it doesn't know a closed-form solution, if it exists. $\endgroup$ – J. M. will be back soon Apr 1 '18 at 12:44
  • $\begingroup$ Ok. Thanks anyhow $\endgroup$ – runner Apr 1 '18 at 12:48
  • $\begingroup$ Solution in Graph: s1 = RecurrenceTable[{a[n + 1] - 12/10*a[n]*(1 - a[n]) == 0, a[1] == 1/10}, a, {n, 1, 20}] // N; ListStepPlot[s1] $\endgroup$ – Mariusz Iwaniuk Apr 1 '18 at 18:57

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