Our German Kangaroo friends shared with us this Math Advent Calendar - pre-Christmas puzzles in Kangaroo style. One Math Kangaroo question a day makes you more imaginative, they say. Comment below with the answer!
#MathAdventCalendar #KangarooStyle #MathKangaroo #Puzzles
意外とMathAdventCalendarからの流入ないですね．／
無限小を用いた記述を標準的な記述に還元することについて differentialengine.wordpress.com/2017/12/08/%e7… WordPress.comさんから