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sequence starting with x=1 and followed by (x+1) and / or x/(x+1)

Source: 1991 ITAMO p6

January 31, 2020
Sequencealgebra

Problem Statement

We say that each positive number xx has two sons: x+1x+1 and xx+1\frac{x}{x+1}. Characterize all the descendants of number 11.