MathCastle
ChallengeMediumTelescoping & Recursion

Telescoping & Recursion · Medium problem

Find the positive integer nn for which log⁡23⋅log⁡34⋅log⁡45⋯log⁡n−1n=10\log_2 3\cdot\log_3 4\cdot\log_4 5\cdots\log_{n-1}n=10.