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Mathematics 6 Online
OpenStudy (hsjkirribilli266199):

find an explicit formula for a sub n {-1, 2/3, -1/3, 4/27, -5/81, ... }

OpenStudy (amistre64):

the denoms appear to be factors of 3, and the sign keeps swapping hmm

OpenStudy (amistre64):

if we rewrite -1/3 as =-3/9 then the pattern should become obvious

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