Multinomial theorem SE1: coefficient of x^8 in (1+x^2-x^3)^9

Multinomial theorem SE1: coefficient of x^8 in (1+x^2-x^3)^9

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[Mathsmerizing]

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[ambujbhaskar]

i was finding this for too long, finally got it. thanks sir.

[zubairkabir]

Thank you sir.. your capability to make students understand is phenomenal..

[syedmdabid]

r=p
r=1 Σ(ncr), where p<n, n, p, r are + ve integers.

[Atman_Shah]

Thank you! Was able to understand this concept with ease thanks to your lucid explaination.

[pritydas]

Thank you so much sir😭❤️
Even my coaching institute didn't teach me such tricks...
Really thankful to you

[masterbss]

Thank you for this problem
Advance congratulations for multinomial subscribers

[Divyanandp]

Channel deserves billions of subscribers😢❤❤

[bkalnoky]

So when we have these two possible combinations, is two different combinations alway enough to find any coefficient?
Because there is still more possible combinations. Does it not matter which two we are choosing?

[monicachauhan]

Thanked sir
I understood application of multinomial theorem in just 3 min because of you

[shushmitabarua]

at last, got the solution to this math..thank you so much, sir! From BANGLADESH

[abhinav]

a year back i was able to do them on fingers
now i couldnt recall
thanks

[tapasdas]

Sir u r great, very clear explanation

[samanyukamra]

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[omegahaifoleet]

Thank you so much! I was struggling with it

[mohdshahnewaz]

I had great confusion for this
But now solved 🙂thx

[maheshuppu]

Good to know this type of process, tnq sir

[_shashank]

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[anshulsharma]

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This is the thing I was looking for.

[vadthyaravi]

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Hope every student find a wonderful teacher like u😊