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PUMaC 2017 · 代数（B 组） · 第 1 题

PUMaC 2017 — Algebra (Division B) — Problem 1

专题
Discrete Math / 离散数学
难度
L3
来源
PUMaC

题目详情

  1. If x is a positive number such that x = (( x ) ) , find ( x ) . 7 6 8
解析
  1. The right hand side is x , so x = x , so x = 3. Thus, the answer is 27 . The problem had an unintended alternate solution of 1 , which was also accepted at PUMaC

Problem written by Eric Neyman 7 6 6 5 2 6