. .
:
1. n (. factorialis , ; n!, ́) 1 n :
:
0! = 1. .
2. -
( , n k), , b .
, , (a+b)n, (k+1) - , k=0,1,2,,n.
, (, ). .
n = 2 n = 3 b:
( + b)2 = 2 + 2ab + b2;
( + b)3 = 3 + 3a2b + 3ab2 + b3;
:
(a + b)5 = a5 + C15 a4b + C25 a3b2 + C35 a2b3 + C45 ab4 + C55 b5 = a5 + 5a4b + 10a3b2 + 10a2b3 + 5ab4 + b5
.
n , . :
n:
. , . , ( ) ( ). , , .
1. (Save Project As)
Unit 1.cpp Main
Project1 , exe (Binom).
,
3. Edit Standart Text
Unit
Function ( Save)
int Factorial (int n)
{
int F =1;
for (int i =2; i < n+1; i ++)
F = F*i;
return F;
}