Предмет: Алгебра, автор: olgapsonko998

Знайти суму двадцяти перших членів арифметичної прогресії, якщо перший член дорівнює 6, а дев'ятий 22

Ответы

Автор ответа: ukguchi

1

Ответ:

Решение на фото

Объяснение:

Приложения:

Автор ответа: Amigo3

2

Ответ: 500, решение на фото.

Объяснение:

Приложения:

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