Question

arata ca numarul
$1 + 2 + {2}^{2} + {2}^{3} + {2}^{4} + {2}^{5} +$ ${2}^{6} + ....... {2}^{96} + {2}^{97} + {2}^{98} + {2}^{99} se \: divide \: cu \: 15$
Dau coroana!
Va rog!!!!!!

Answer 1

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