How to simplify Factorials - full example 

so helpful!!! the books can be confusing, theres nothing better than a persons work!!! thanks!!

Wonderful! It’s hard to find videos on factorials that have some algebraic rigor to them.

Thank you. You have been very helpful

I have a question! how can we find value for m + n = ? If 5! m! = n!, for m>= 4.