037-сумма первых n членов арифметической прогрессии. Практическая часть. 2 часть. 9 класс. (720p)
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![[Nobel] Счастье Грузии и будущее Хвичи / Отец Кварацхелии и Мамука Джугели](https://sun9-63.userapi.com/impg/gqdZjE08iPJzR79XuFXn3ByGB-xa-sShcE0smg/j6ISzCCXaFM.jpg?size=320x240&quality=95&keep_aspect_ratio=1&background=000000&sign=7a2593e5fc211c6294abb5784979eac1&c_uniq_tag=9l7Fkjna9FOFFTX2eC0mlggOVICxKboTimAduhRGELQ&type=video_thumb)
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