Tentukan suku ke 10 dan suku ke -n(u) dari
2,8,32,128
2,8,32,128
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r = 8/2 = 4
U10 = a × r^(n - 1)
= 2 × 4^(10-1)
= 2 × 4^9
= 2 × 262.144
= 524.288
Un = a × r^(n - 1)
Un = 2 × 4^(n-1)