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Оlolosa
@Оlolosa
July 2022
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bn геометрическая прогрессия,знаменатель прогрессии равен 2/5 b1=75
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amirmullagaliev
Verified answer
Q = 2/5 = 0.4, b₁ = 75, S₅ - ?
S₅ = (b₁ * (1 - q⁵)) / (1 - q) = (75 * (1 - (2/5)⁵)) / (1 - 2/5) = (75 * (1 - 32/3125)) / (3/5) = 123,72
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Verified answer
Q = 2/5 = 0.4, b₁ = 75, S₅ - ?S₅ = (b₁ * (1 - q⁵)) / (1 - q) = (75 * (1 - (2/5)⁵)) / (1 - 2/5) = (75 * (1 - 32/3125)) / (3/5) = 123,72