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Bacau 2001
Posted: Mon Nov 10, 2008 8:36 pm
by alex2008
Cercetati daca \( \frac{\overline{xx9}+\overline{8x}+7}{\overline{x9x}+\overline{x6}} \in \mathb{N} \) , unde x este cifra in baza 10.
Posted: Wed Mar 25, 2009 12:07 am
by Andi Brojbeanu
\( \frac{\overline{xx9}+\overline{8x}+7}{\overline{x9x}+\overline{x6}}= \)\( =\frac{110x+9+80+x+7}{101x+90+10x+6}=\frac{110x+96}{110x+96}=1\in \mathb{N} \).
Posted: Wed Mar 25, 2009 11:18 am
by Marius Dragoi
Incearca sa scrii in \( LaTeX \)...