6.3. Can three fractions be chosen from $1 / 2017, 2 / 2016, 3 / 2015, \ldots, 2017 / 1$ such that their product equals 1?
Answer: It can be. Solution. $1=(1 / 2017) \times(1009 / 1009) \times(2017 / 1)$.

Comment. At least one example is provided - 7 points.