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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Ответ:
an=a1+(n-1)d
d=-6-(-8)
a9=(-8)+(9-1)×2
a9=(-8) + 16
a9= -8+16=8