Derangement - the !n formula through recurrence, and Euler's Constant e comes in

[@sumittete2804]

29:40 , why did you add 1/2 in the floor function? Please explain

[@thinkinginmath3009]

we try to round the number to the closest integer. e.g, at 23:00, turn n=10, n!/e = 1334960.92 to 1334961. or in general, turn x to the floor of x+0.5

[@RahulMani81]

22:59, D8 should be rounded up as D4, D6 and D10, etc to 14833 ??

[@thinkinginmath3009]

Yes, it should be rounding up to 14833. Thanks for spotting the error.

[@sumittete2804]

29:40 why did he add 1/2 in the floor function? Please explain. Secondly, Is he rounding up the number using floor function? If it is so then instead of 14833 it should be 14832

[@sumittete2804]

​@@thinkinginmath3009 If you are using floor function then it should be rounded up to 14832 instead of 14833