Предмет: Алгебра, автор: Аноним

Помогите, пожалуйста, решить геометрическую прогрессию.

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Ответы

Автор ответа: sitchihina2016

в7=320*-0,0078125=-2,5
в7=-2,5

Автор ответа: KirillLity

b7=320*(-1/2)^7
b7=320*(-1/128)
b7=-320/128=-10/4=-2,5
b7=-2,5

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