Solution: 2014-09 Product of series

For integer n1, define
an=k=0knk!,bn=k=0(1)kknk!.
Prove that anbn is an integer.

The best solution was submitted by 황성호. Congratulations!

Similar solutions were submitted by 박훈민 (+3), 이규승 (+3), 이승훈 (+3), 이영민 (+3), 이종원 (+3), 장기정 (+3), 정성진 (+3), 채석주 (+3), Zhang Qiang (+2). Thank you for your participation.

GD Star Rating
loading...