Предмет: Алгебра, автор: sesilia2013

Алгебра, Вариант 3, геометрическая прогрессия

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Автор ответа: coolneol

(bn)-геом.прогр.
b1=4 b2=-2
bn+1=q*bn
q=b2:b1
q=-2:4=-0.5

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