OJM 2010 Problema I

Moderators: Bogdan Posa, Laurian Filip

Post Reply
User avatar
Andi Brojbeanu
Bernoulli
Posts: 294
Joined: Sun Mar 22, 2009 6:31 pm
Location: Targoviste (Dambovita)

OJM 2010 Problema I

Post by Andi Brojbeanu »

(i) Descompuneti in factori expresia \( xy-x-y+1 \).
(ii) Demonstrati ca daca numerele intregi \( a \) si \( b \) verifica \( |a+b|>|1+ab| \), atunci \( ab=0 \).
***
Andi Brojbeanu
profesor, Liceul Teoretic "Lucian Blaga", Cluj-Napoca
Top
User avatar
andreiilie
Euclid
Posts: 38
Joined: Mon May 24, 2010 4:45 pm

Post by andreiilie »

una dintre cele mai usoare probleme date la judetenele de mate la cls VII in ultimii 5 ani :) necesita atentie
Top
Post Reply

Return to “Clasa a VII-a”