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=(6 +2/3 - 2 -2/9 + ...)
=(6 + 2/3 - (2 + 2/9) + ...
jadi, jumlah deret dibagi 2,
untuk (6 + 2/3 +...) --> rasio (r)=1/9
Sn=a/(1-r)
=6/(1-1/9)
=6/(8/9)
=16/3 (1)
untuk (2 + 2/9 + ...) ---> rasio (r) =1/9
Sn=a/(1-r)
=2/(1-1/9)
=2/(8/9)
=16/9 (2)
jadi, jumlah deret total = (1) - (2)
= 16/3 - 16/9
= 96/9