Factorial
What is factorial?
Product (multiplication) of all positive integers
(including 0) less than or equal to n. In other words, multiply all numbers from
to 1.
0 | 1 |
1 | 1 |
2 | 2 × 1 = 2 |
3 | 6 |
4 | 24 |
5 | 120 |
6 | 720 |
7 | 5040 |
8 | 40320 |
9 | 362880 |
10 | 3628800 |
… | … |
Examples:
- = 4 × 3 × 2 × 1 = 24
- 7 × 6 × 5 × 4 × 3 × 2 × 1 = 5040
- 1
- 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 3628800
10! = 10 × 9!, … and 125! = 125 × 124!, etc. How this can be described in a
formula?
Where is just part of .