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det nr nat n pt 8n+8n+1=18x2la2003

Răspuns :

[tex]8^n+8^{n+1}= 18\cdot 2^{2003}\\8^n(1+8)=18\cdot 2^{2003}\\8^n\cdot 9=18\cdot 2^{2003}\\8^n=2\cdot 2^{2003}\\2^{3n}=2^{2004}\\3n=2004\\\boxed{n=668}\\\text{Hope you understood.}[/tex]