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HMMT 2007 A8

  • Algebra
  • Answer

Let A:=Q\{0,1}A:=\mathbb{Q} \backslash\{0,1\} denote the set of all rationals other than 0 and 1. A function f:A→Rf: A \rightarrow \mathbb{R} has the property that for all x∈Ax \in A,

f(x)+f(1−1x)=log⁡∣x∣f(x)+f\left(1-\frac{1}{x}\right)=\log |x|

Compute the value of f(2007)f(2007).

Dataset text NuminaMath olympiads. Quoted with source.

Also HMMT 2007 F9.

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\log (2007 / 2006)

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