June 2022 1 9 Report
1)Вычислить сумму 12-го и 23-го членов арифметической прогрессии,если а8=12,3 а27=2,8
2)Найдите первый член и разницу арифметической прогрессии если а1+а2+а3=18;а1*а2*а3=162
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