Factorial Notation


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More Lessons for High School Regents Exam
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High School Math based on the topics required for the Regents Exam conducted by NYSED.

What is a factorial?
For a positive integer n, n! is the product of positive integers less than or equal to n.

The following diagram describes the factorial notation and gives some examples using factorials. Scroll down the page for more examples and solutions using factorials.

Factorial Notation

How to evaluate factorials?
Factorials - Evaluating Factorials!
Basic Info on Factorials and some numerical examples are provided.




Simplify Expressions with Factorials Containing Variables
This video provides three examples of how to evaluate factorials and how to simplify expression involving factorials.

Factorial Notation
A tutorial video on working with constant and variable factorial.



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