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voronaveron
@voronaveron
June 2022
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помогите решить геометрическую прогрессию
s6-?
b1=18 q=1/3
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sangers1959
Verified answer
B₁=18 q=1/3 S₆-? n=6
S₆=b₁*(qⁿ-1)/(q-1)=18*((1/3)⁶-1)/(1/3-1)=18*((1/729-1)/(-2/3)= =(-18*728/729)/(-2/3)=2*3*728/(81*2)=728/27=26²⁶/₂₇.
Ответ: S=26²₂₇.
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Answers & Comments
Verified answer
B₁=18 q=1/3 S₆-? n=6S₆=b₁*(qⁿ-1)/(q-1)=18*((1/3)⁶-1)/(1/3-1)=18*((1/729-1)/(-2/3)= =(-18*728/729)/(-2/3)=2*3*728/(81*2)=728/27=26²⁶/₂₇.
Ответ: S=26²₂₇.