Determinar o número de termos da P.G. ( -1, -2, -4....,-512 ) Alguém sabe ?
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Primeiro devemos encontra a razão :

Agora aplicar o termo geral :

Agora fatorar - 512
512 |2
256 |2
128 |2
64 |2
32 |2
16 |2
8 |2
4 |2
2 |2
1
Contar quantas vezes foram divididas : 9

Agora aplicar o termo geral :
Agora fatorar - 512
512 |2
256 |2
128 |2
64 |2
32 |2
16 |2
8 |2
4 |2
2 |2
1
Contar quantas vezes foram divididas : 9
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