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anonymous
 one year ago
Simplfy (n)  (n1)
(r) (r)
anonymous
 one year ago
Simplfy (n)  (n1) (r) (r)

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\left(\begin{matrix}n \\ r\end{matrix}\right)  \left(\begin{matrix}n1 \\ r\end{matrix}\right)\]

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443370171228:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1I'm feeling my way here ... and i'm not sure if it will lead to much simplification...

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1oh i misread the question the second part is dw:1443371547831:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1well i've got an expression which contains factorials but its not that simple!

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443372120105:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\begin{align*}\binom nr\binom{n1}r&=\frac{n!}{r!(nr)!}\frac{(n1)!}{r!(n1r)!}\\[1ex] &=\frac{(n1)!}{r!(n1r)!}\left(\frac{n}{(nr)}1\right)\\[1ex] &=\frac{(n1)!}{r!(n1r)!}\left(\frac{n(nr)}{(nr)}\right)\\[1ex] &\vdots \end{align*}\]
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