When writing factorials you would want to write (9!)! since 9!! is actually a different operation (the double factorial). 9!! = 9 x 7 x 5 x 3 x 1, so 9!! is le

When writing factorials you would want to write (9!)! since 9!! is actually a different operation (the double factorial). 9!! = 9 x 7 x 5 x 3 x 1, so 9!! is less than 9!.