Jawabanmu

2014-01-05T06:29:05+07:00
Rumus Un = ar ^{n - 1}
Cari rasio dulu
U4 = ar³
32 = 4r³
8 = r³
2³ = r³
2 = r

Masukkan rumus U7 = ar ^{6}
U7 = 4x2  ^{6}
U7 = 4x64
U7 = 256