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Lisafominastar
@Lisafominastar
August 2022
1
22
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Помогите решить а б в!!!
Даю 40 баллов
Xn=4n+5
а) S6
б) S20
в) Sk
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DariosI
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Формула суммы арифметической прогрессии:
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Формула суммы арифметической прогрессии: