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rapid - raspundeti cu rezolvare completa

Rapid Raspundeti Cu Rezolvare Completa class=

Răspuns :

[tex]\bf A=7\cdot12^n\cdot3^n\cdot3+6\cdot4\cdot4^n\cdot9^n\cdot9^2+18\cdot18^n\cdot2^n\cdot2\ \Rightarrow\\ \\ \\ A=36^n(21+1944+36)=36^n\cdot2001\ \in\ M_{2001}\ \Rightarrow \ A\ \vdots\ 2001[/tex]