Tìm hàm $f: R^+\rightarrow R^+$
$f(x^3+y)=f^3(x)+\frac{f(xy)}{f(x)}$
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Posted 25-11-2014 - 03:58
hhanhno
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Giai dum tieu de bai phuong trinh ham nay.
Tim ham f: R -> R thoa f(x+y)+ f(x-y)-2f(x).f(1+y)=2xy(3y-x^2)
Tim ham f: R -> R thoa f(x+y)+ f(x-y)-2f(x).f(1+y)=2xy(3y-x^2)
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