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November 17th, 2018, 11:41 PM  #1 
Newbie Joined: Nov 2018 From: France Posts: 8 Thanks: 0  Some fundamental question in combinatorics
Hey. We started to study all this subject of combinatorics integrated with the subject of functions. 1. I don't actually understand how to integrate between combinatorics and function, those functions which represent our possibilities and etc... And why at all we need to represent our combinatoric problem with an answer integrating functions? 2. Secondly, we get this formula to calculate some sorts of possibilities: \frac {n!} {(nk)!} It's not clear to me why is this really correct, what is posed behind it? 3. For the Newton's binom  the lecturer has presented the proof for it but I don't understand it well, he also used the formula from above (2) to present the proof. Thank you! Last edited by CStudent; November 17th, 2018 at 11:46 PM. 
November 18th, 2018, 10:36 AM  #2 
Senior Member Joined: May 2016 From: USA Posts: 1,210 Thanks: 497 
Answered at Free math help


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