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AMC 12 2025b Problem 7

  • Paper

What is the value of

∑n=2255log⁡2(1+1n)(log⁡2n)(log⁡2(n+1))\sum_{n=2}^{255} \frac{\log_2(1+\frac{1}{n})}{(\log_2 n)(\log_2(n+1))}

(A) 34(B) 1−1log⁡2255(C) 78(D) 1516(E) 1\textbf{(A) } \dfrac{3}{4} \textbf{(B) } 1-\dfrac{1}{\log_2 255} \textbf{(C) } \dfrac{7}{8} \textbf{(D) } \dfrac{15}{16} \textbf{(E) } 1

Dataset text AMC 12 2000 to 2025. Quoted with source.

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C

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