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a fost răspuns

 8^{n} +8 ^{n+1}=18 ·2²°°³
determinati nr nat

Răspuns :

Albastruverde12
[tex] 8^{n}+ 8^{n+1}= 8^{n}(1+8)= 8^{n}*9=9* 2^{3n} [/tex]
[tex]18* 2^{2003}=9*2* 2^{2003} =9* 2^{2004} [/tex]

[tex]9* 2^{3n} = 9*2^{2004} => 2^{3n} = 2^{2004} =>3n=2004 => n=668.[/tex]

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