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[Frosty Flame]

Tìm tất cả hàm số $f:\mathbb{R}\rightarrow \mathbb{R}$ thỏa mãn

$f(af(y)+bx)=cx+dy+e(a,b,c,d,e\neq 0, b\neq -ac)$

Edited by Frosty Flame, 23-08-2018 - 17:25.