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a = 1/3
r = 1/6 dibagi 1/3 = 1/6 x 3 = 1/2
Karena r<1, maka
Sn = a (1 - r^n)
-------------
1 - r
1/3 (1 - 1/2^10) 1/3 x (1 - 1/1024) 1/3 x 1023/1024
S10 = --------------------- = ------------------------ = ------------------------
1 - 1/2 1/2 1/2
= 1023/3072 x 2
= 1023/1536
= 341/512
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