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Verified answer
A) r = 2/1 = 2b) U9 = ar^n-1 = 1.2^9-1 = 2^8 = 256
Verified answer
Bab Barisan dan DeretMatematika SMP Kelas IX
1, 2, 4, 8, ...
A] r = U2/U1
r = 2/1
r = 2
B] U9 = a x r^8
U9 = 1 x 2^8
U9 = 256