Hasil dari barisan 6+12+24+48+....+1.536 adalah..

jawab
deret geometri

a= 6
r = 2
un = 1.536
a.rⁿ⁻¹ = 1.536
6. 2ⁿ⁻¹ = 1.536
2ⁿ⁻¹ =1.536 / 6 = 256 = 2⁸
n - 1 = 8
n = 9

s9 = a (r⁹ - 1) /(r -1)
s9 = 6. (2⁹  -1) / (2 -1)
s9 =6 (511) 
s9 = 3.066