Предмет: Алгебра, автор: stdory07

найдите девятый член арифметической прогрессии -8;-6;5;....
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Ответы

Автор ответа: itisnoname
1

Ответ:

an=a1+(n-1)d

d=-6-(-8)

a9=(-8)+(9-1)×2

a9=(-8) + 16

a9= -8+16=8

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