Bacau 2001
Moderators: Bogdan Posa, Laurian Filip
Bacau 2001
Cercetati daca \( \frac{\overline{xx9}+\overline{8x}+7}{\overline{x9x}+\overline{x6}} \in \mathb{N} \) , unde x este cifra in baza 10.
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Andi Brojbeanu
- Bernoulli
- Posts: 294
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\( \frac{\overline{xx9}+\overline{8x}+7}{\overline{x9x}+\overline{x6}}= \)\( =\frac{110x+9+80+x+7}{101x+90+10x+6}=\frac{110x+96}{110x+96}=1\in \mathb{N} \).
Last edited by Andi Brojbeanu on Sun Apr 19, 2009 10:46 am, edited 1 time in total.
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Marius Dragoi
- Thales
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