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Verified answer
2, 8, 32,..suku pertama a = 2
rasio = 8/2 = 32/8 = 4
Un = ar^(n-1)
Un = 2.4^(n-1)
Un = 2.(2^2)^(n-1)
Un = 2.2^(2n-2)
Un = 2^(2n-1)
^ = pangkat