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NguyenDang25 hasn't added any friends yet.
10-09-2018 - 21:26
Tìm tất cả các hàm $f \colon \mathbb R \to \mathbb R$ thỏa mãn điều kiện $$f(3f(x)+2y)=10x+f(2f(y)-x) \forall x,y \in \mathbb{R}$$