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MathNet 2024-part-02 — 168 problems (EN–VI) Question 92

Math Olympiad Vault · MathNet 2024-part-02 — 168 problems (EN–VI)

Question 92

Determine all functions $f$ from $\mathbb{R}$ to $\mathbb{R}$ such that for all real $x, y$:
$$
f(x) f(y) f(x-y) = x^{2} f(y) - y^{2} f(x)
$$