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Verified answer
U6/U3 = ar^5/ar² = 2048/32r³ = 64
r = 4 (rasio)
ar² = 32
a(4²) = 32
a(16) = 32
a = 32/16
a = 2 (suku pertama)
Un = ar^(n-1)
Un = 2.4^(n-1)
Un = 2.4ⁿ.4^-1
Un = 2.4ⁿ.(¼)
Un = 2(¼).4ⁿ
Un = (½)4ⁿ