Math Problem Statement
Trouver toutes les fonctions f : R → R satisfaisant l’´equation fonctionnelle suivante pour tous x, y ∈ R : f(y − f(x)) = f(x) − 2x + f(f(y)).
Solution
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Math Problem Analysis
Mathematical Concepts
Functional Equations
Substitution
Linear Functions
Formulas
f(y − f(x)) = f(x) − 2x + f(f(y))
f(x) = ax + b
Theorems
Linearity Hypothesis
Functional Equation Solutions
Suitable Grade Level
University Level
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