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JCJuStCrAzY
@JCJuStCrAzY
June 2022
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ПОМОГИТЕ ПОЖАЛУЙСТА! ОЧЕНЬ СРОЧНО!!!
Найти сумму первых восьми членов геометрической прогрессии (вn), в которой в1=8 и q=1/2
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AzzzOfficial
(bn)- геометрическая прогрессия
b1 = 8
q = 1/2 = 0,5
S8 = ?
S8 = 8 * (1 - 0,5^7) / 1 - 0,5 = 8 * ( 1 - 0,0078125) / 0,5 =
8 * 0.9921875 / 0,5 = 7,9375 / 0.5 = 15,875
Ответ : 15,875
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Answers & Comments
b1 = 8
q = 1/2 = 0,5
S8 = ?
S8 = 8 * (1 - 0,5^7) / 1 - 0,5 = 8 * ( 1 - 0,0078125) / 0,5 =
8 * 0.9921875 / 0,5 = 7,9375 / 0.5 = 15,875
Ответ : 15,875