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Verified answer
Kelas 8 MatematikaBab Barisan dan Deret Bilangan
r = ⁴⁻²√(U4 / U2)
r = ²√(27 / 3)
r = √9
r = 3
U7 = U4 . r³
U7 = 27 . 3³
U7 = 27 . 27
U7 = 729