Factorials Add the Exclamation Point to Math
My latest Decoded Science article, “Introducing the Factorial, the Exclamation Mark of Math“, begins by looking at “n! = n * (n-1) *…* 2 * 1” and its uses.
How does a “Factorial” Relate to a “Permutation”?
The factorial function, “n!“, expresses the number of ways that a collection of ‘n‘ unique objects can be “permuted” or ordered.
For example, how many sequences are there to draw bingo balls?
My article goes on to describe a few more uses of the factorial function.
There are also extensions to factorials of Real numbers, rather than sticking with positive integers. That brings in the gamma function, “Γ(z)“, where ‘z‘ can be a Complex number.
My article starts a series that should cover more permutations, combinations and probability topics. “Stay tuned”.
Publicity to Flog Factorials
As always, my Xanga blog (”Math’s Exclamation Point, the Factorial“) has a promotional entry; while in my Blog of Writing, “Preview of the Factorial Article” includes a friendly-to-factorials writing tip.
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Thank you for reading about my introduction to the factorial function.