Bantuin no 91 pake cara dong

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91. 
1/(n+1) = 2⁻⁸
n+1 = 2⁸
n = 2⁸ - 1 = 255

92.
x+ 1 = 3⁻⁸/⁻² = 3⁴
x = 3⁴ -1 = 81 -1
x = 80
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lampiran