Предмет: Алгебра, автор: rassadkinaludocka13

2) x_{n} = 2n - 9 . Найдите значение суммы 12 первых ее членов.

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Автор ответа: vampbzrkr

1

Сумма первых 12 членов заданной арифметической последовательности \( x_{n} = 2n - 9 \) равна 48.

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