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Determinati nr natural n stiind ca 2^9+2^10+2^11=n×2^9

Răspuns :

2^9+2^10+2^11=n×2^9

2^9 × (1 + 2 + 2^2) = n × 2^9

2^9 × 7 = n × 2^9

n = 7