Tìm tất cả các hàm số $f:\mathbb{N}\rightarrow \mathbb{N}$ thỏa mãn: $a^{2}f(a)+b^{3}$ $\vdots$ $a+f(b),\forall a, b\in \mathbb{N}.$
Edited by Zz Isaac Newton Zz, 10-05-2018 - 16:33.
Tìm tất cả các hàm thỏa mãn $a^{2}f(a)+b^{3}$ $\vdots$ $a+f(b),\forall a, b\in \mathbb{N}.$
Started By Zz Isaac Newton Zz, 10-05-2018 - 16:32
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