Question

КОНТРОЛЬНАЯ PABOTA № 5 Вариант 2 1. Найдите девятый член геометрической прогрессии \( 3 ; 6 \); \( 12 ; \ldots \).

Ask by Li Dickson. in Russia
Mar 18,2025

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Девятый член геометрической прогрессии равен 768.

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Bonus Knowledge

Чтобы найти девятый член геометрической прогрессии, нужно определить первый член и знаменатель прогрессии. Первый член \( a_1 = 3 \), а знаменатель \( q = \frac{6}{3} = 2 \). Формула для n-го члена геометрической прогрессии выглядит так: \[ a_n = a_1 \cdot q^{(n-1)} \] Для девятого члена: \[ a_9 = 3 \cdot 2^{(9-1)} = 3 \cdot 2^8 = 3 \cdot 256 = 768 \] Таким образом, девятый член геометрической прогрессии равен 768.

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