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Verified answer
Un = a.r^(n-1)8 = 0,5 . 2^(n-1)
√8 = 0,5 . (n - 1)
2/0,5 = n - 1
n = 4 +1
n = 5
jadi, banyak potongan tali adalah 5
maaf klo salah :(