Math Problem Statement

Tìm hàm f : R→R thoả mãn (x −y)f(x+y)−(x+y)f(x−y) = 4xy(x2 +y2)∀x,y ∈ R

Solution

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Math Problem Analysis

Mathematical Concepts

Functional Equations
Variable Transformation

Formulas

Equation transformation techniques

Theorems

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Suitable Grade Level

Advanced Mathematics