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Explanation of what a factorial number or the factorial of a number is and its properties. Complete Combinatorics Course: Combinations, Permutations and Variations ... _________________________________________________________________ If you want to help me so that the channel continues to grow you can: Subscribe: https://www.youtube.com/matematicaspr... Contribute to the channel with a donation: https://www.paypal.me/profeAlex Become a member of the channel: https://www.youtube.com/matematicaspr... _________________________________________________________________ Download my MathAlex app: http://onelink.to/vmcu3e Visit my website: https://www.MatematicasProfeAlex.com Follow me on my social networks: Facebook: / matematicasprofealex Instagram: / matematicasprofealex Contact Only business, press: [email protected] 0:00 Greeting 0:22 Concepts that you should know (Property) 2:42 Examples 5:54 Concepts that you should know (Property) 6:25 Examples 7:39 Example solution 8:31 Concepts you should know (Property) 8:38 Examples