Factorial/Examples/6
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Example of Factorial
- $6! = 720$
Proof
| \(\ds 6!\) | \(=\) | \(\ds 6 \times 5!\) | Definition 1 of Factorial | |||||||||||
| \(\ds \) | \(=\) | \(\ds 6 \times 120\) | Factorial of $5$ | |||||||||||
| \(\ds \) | \(=\) | \(\ds 720\) |
$\blacksquare$
Sources
- 2009: Murray R. Spiegel, Seymour Lipschutz and John Liu: Mathematical Handbook of Formulas and Tables (3rd ed.) ... (previous) ... (next): $\S 3$: The Binomial Formula and Binomial Coefficients: Factorial $n$