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tigran6469
@tigran6469
July 2022
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b1=5 q=2 S2-?
решите пж
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sherlok123321
Формула суммы геометрической прогрессии:
Sn=b1(q^n-1)/(q-1)
Тогда S2= 5(2^2-1)/(2-1)=15
Ответ: S2=15
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Answers & Comments
Sn=b1(q^n-1)/(q-1)
Тогда S2= 5(2^2-1)/(2-1)=15
Ответ: S2=15