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Senechca1314
@Senechca1314
July 2022
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ПОЖАЛУЙСТА,
В геометрической прогрессии (cn): c4= корень из 5; c7= -25. Найдите знаменатель прогрессии.
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oganesbagoyan
Verified answer
C4=c1*q^3=sqrt(5)
c7=c1*q^6=-25
(c1*q^6)/(c1*q^3)=-25/sqrt(5) ==>q^3=-5*sqrt(5) =-sqrt(5)^3
q^3=-sqrt(5)^3
q =-sqrt(5)
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Verified answer
C4=c1*q^3=sqrt(5)c7=c1*q^6=-25
(c1*q^6)/(c1*q^3)=-25/sqrt(5) ==>q^3=-5*sqrt(5) =-sqrt(5)^3
q^3=-sqrt(5)^3
q =-sqrt(5)