1/2 + 1/4 + 1/8 +.... +1/2n=127/129 hitung nilai n
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Pertanyaan
1/2 + 1/4 + 1/8 +.... +1/2n=127/129 hitung nilai n
1 Jawaban
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1. Jawaban yogihendrawan89
a=1/2
r=1/2
Sn=a(1-r^(n))/(1-r)
127/128=1/2(1-1/2^(n))/1/2
1/2^(n)=1/128
n=7