December 2021 0 11 Report
Найдите сумму ряда: 1) 1/3+1/9+...+1/3n+...
Найдите знаменатель геометрической прогрессии {an},если :
3)а2=1 ; а3= 3 под корнем -1 / 3 под корнем+1
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