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(3^k - 2^k)(2^n - 3^(k+1))/[(2^n - 3^k)(3^(k+1) - 2^(k+1))] < 1/3
(3^k - 2^k)(2^n - 3^(k+1))/[(2^n - 3^k)(3^(k+1) - 2^(k+1))] < 1/3
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