Ecuatie functionala 2
Posted: Sat Feb 06, 2010 8:31 pm
Sa se determine toate functiile \( f:\mathbb{R}\rightarrow \mathbb{R} \) astfel incat:
\( f(f(x+y))=f(x+y)+f(x)\cdot f(y)-xy\ ,\ (\forall)x,y\in \mathbb{R} \)
\( f(f(x+y))=f(x+y)+f(x)\cdot f(y)-xy\ ,\ (\forall)x,y\in \mathbb{R} \)