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znaika35
@znaika35
August 2022
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Помогите алгебра номер 225
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sedinalana
Verified answer
A1=5,a2=5/6
q=a2/a1=5/6:5=1/6
S3=a1*(1-q³)/(1-q)
S3=5*(1-1/216):(1-1/6)=5*215/216*6/5=215/36=5 35/36
S6=q1*(1-q^6)/(1-q)
S6=5*(1-1/46656):(1-1/6)=5*46655/46656*6/5=46655/7776= 5 7775/7776
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Answers & Comments
Verified answer
A1=5,a2=5/6q=a2/a1=5/6:5=1/6
S3=a1*(1-q³)/(1-q)
S3=5*(1-1/216):(1-1/6)=5*215/216*6/5=215/36=5 35/36
S6=q1*(1-q^6)/(1-q)
S6=5*(1-1/46656):(1-1/6)=5*46655/46656*6/5=46655/7776= 5 7775/7776