Math Problem Statement
Tìm tất cả các hàm số f : R → R thoả mãn f (x−y)2 =(f(x))2 −2xf(y)+y2,∀x,y ∈ R.
Solution
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Math Problem Analysis
Mathematical Concepts
Functional Equations
Formulas
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Theorems
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Suitable Grade Level
University Level
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