Factorials Explained!

This precalculus video tutorial provides a basic introduction into factorials. It explains how to simplify factorial expressions as well as how to evaluate factorial expressions. It discusses how to add and subtract factorials as well as how to multiply and divide factorials. It also explains how to simplify algebraic expressions containing factorials and the variable n.

Intro to Statistics:

Probability - Basic Intro:

Binomial Theorem:

Permutations and Combinations:

Factorials Explained!

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Parametric Equations:

Ellipses - Conic Sections:

Hyperbolas - Conic Sections:

Parabolas - Conic Sections:

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Arithmetic Sequences:

Geometric Sequences:

The Fibonacci Sequence:

Mathematical Induction:

Induction Divisibility:

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Final Exams and Video Playlists:

[shadowscythes]

Came here for a basic rundown when factorials were suddenly introduced in a math lesson and I'd never heard of them before, thanks for such a simple and straightforward explanation!

[wiktorman]

I'm not in the school anymore but thanks to your videos I'm looking forward to learning maths just for fun. Everything you explain is logical and clear. You are the best teacher on the internet, thank you!

[littlemstc]

literally, I'm in calc two and my professor just included factorials in a problem one day as if all of knew or seen an exclamation point in a math problem before. but it's simple all he had to do was say it. so thank you TOCT

[hydrogenandhelium]

Life was so much easier when only numbers were involved

[monkimikiii]

English is not my native language, but your explanation is more effective than the explanations of teachers in my native language. thank you so much

[rhythm]

I literally watched the ad because i like this dude

[scottsommers]

dude I skip classes to bc watching these is so much more efficient. you are a god damn hero.

[majdalin]

i don't know why school teachers doesn't explain like you, Math would have been easier if they were like you thank you so much you made my day

[cyanide]

Im in year 7 and i understood this man can you take over our educational system

[graces]

Why do professors have to make everything so complicated when it's this easy to explain? NOT saying your work is light, because you're literally carrying thousands of HS and college students through their courses but like... I can't even glean any of this from the lectures my school gives, and we all know how much uni costs. Thank you so much for saving my grades and helping me understand the math!

[hayden]

My teachers explanation of factorials was: Here, look.. 5! is 5 * 4 * 3 * 2 * 1. Get it? Sweet! Now lets do a series .. (2n+5)! / n(4n-1)!


In other words, thank you math jesus

[hamzahimran]

its so interesting how university math seems so complicated and difficult yet when broken down seems simple

[hebijs]

I've never heard of factorials before and now I understand it. You're good at what you're doing 👍

[shahdmohamed]

Your channel is amazing thank you
جزاك الله خيرا

[liliacfury]

Just in time! Cruddy teacher = Cruddy understanding. Good teacher = Good understanding. You’re the good teacher.

2 years later and y’all are still complaining. I fixed it, happy?

[fisniksulejmani]

thank you bro you have saved my day!i have watched almost 10 videos that means that i didnt understand my lessons in school thats bcoz of my teacher but you saved my day, you saved 9999 mil days, so god bless this person plz...

[niclindseywilson]

Wow! I was seriously struggling with a specific factorial simplification problem and it turns out it was one of the very ones that you solved in this video. Glory to God! Thank you so much my friend. You're videos help me so much. Take Care!

[helpontheway]

Thank you. Came looking for an explanation on simplifying (n+1)!/n! And I got just that.
Much love

[mqkmail]

Your tutorial videos are super helpful. They are the best I've seen and make challenging problems suddenly easy to understand. Thank you SO much!

[omnithewolf]

No one should do as many math videos as this channel has. I think TOCT (The Organic Chemistry Tutor) is a robot. That’s the only logical thing left. When the world ends he will continue going. One day somebody will find the lair he has and it’ll be a bunch of wires and a big robot brain that’ll be going over math lessons.