(n−2n) simplifies down to what?
Just to clarify
- Is this supposed to be Combination/Permutation?
- Or is this something more advanced?
Not familiar with this notation.....however....if it's supposed to be
( n ) we have
n - 2
n!
_________________ =
(n - (n - 2)! (n - 2)!
___________ =
2! ( n - 2)!
n ( n - 1)
________
2
+659 
