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= 4 (1 - (1/3)^6) / (1 - 1/3)
= 4 ( 1 - 1/729) / (2/3)
= 6 (728/729
= 88452
Barisan Geometri : a , ar , ar² , ar³ , ar^4 , ar^5
4 , 4/3 , 4/9 , 4/27 , 4/81 , 4/243
Deret Geometri : 4 + 4/3 + 4/9 + 4/27 , 4/81 , 4/243
Sn = a(1 - r^n)
1 - r
S6 = 4(1 - (1/2)^6)
1 - 1/3
= 4(64/64 - 1/64)
2/3
= 6(63/64)
= 189/32