What is the solution of this functional inequality?

Beginner1234 · 2019-06-26T23:23:55+00:00

Find all functions f: R -> R, f(x+y)+y <= f(f(f(x))) for any x, y real values.

Find all functions [MATH]f: R -> R, f(x+y)+y <= f(f(f(x)))[/MATH] for any [MATH]x, y[/MATH] real values.

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