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Soal tidak dapat dikerjakan karena kurang data
24 = V(3 x Un)
576 = 3 x Un
Un = 192
(ar^(n-1))/a = 192/3
r^(n-1) = 64
r = 2 dan n = 7
Sn = a(r^n - 1)/(r- 1)
= 3(2^7 - 1)/(2-1)
= 3(128 - 1)
= 381
Semoga membantu :)