Thứ Hai, 7 tháng 1, 2019

IMO 1959- Problem 1

Problem: For every integer $n$ prove that the fraction $\frac{21n+4}{14n+3}$ cannot be reduced any further.
Solution: The desired result $(14n+3,21n+4)=1$ follows from $3(14n+3)-2(21n+4)=1$.
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