October 2018 2 419 Report

Jeśli 1/9, a,b,c,9 to pięć kolejnych wyrazów ciągu geometrycznego, to

A. a= -1/3, b=1 c=3

B. a=-1/9 b=1 c=3 lub a=1/9 b=1 c=-3

C. a=1/9, b=1, c=-3

D. a= 1/3, b=1, c=3 lub a= -1/3, b=1, c=-3

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