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This question was answered, but I don't really understand it.

 

Let f(n) = n^2 + 1 if n is odd. Let f(n) = n/2 if n is even.

 

For how many integers n from 1 to 100, inclusive, does f(f(... f(n)...)) = 1 for some number of applications of f?

 May 12, 2020
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The answer is 75.

 May 16, 2020

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