Problem

Source: Baltic Way 2022, Problem 1

Tags: function, algebra



Let $\mathbb{R^+}$ denote the set of positive real numbers. Assume that $f:\mathbb{R^+} \to \mathbb{R^+}$ is a function satisfying the equations: $$ f(x^3)=f(x)^3 \quad \text{and} \quad f(2x)=f(x) $$for all $x \in \mathbb{R^+}$. Find all possible values of $f(\sqrt[2022]{2})$.