Factorial/Examples/4

Example of Factorial

$4! = 24$


Proof

\(\ds 4!\) \(=\) \(\ds 4 \times 3 \times 2 \times 1\) Definition of Factorial
\(\ds \) \(=\) \(\ds 24\)

$\blacksquare$


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 $n$
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