Question 340402
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*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \frac{n!}{(n\ -\ 1)!]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ n!\ =\ n\,\cdot\,(n\ -\ 1)\,\cdot\,(n\ -\ 2)\,\cdots\,3\,\cdot\,2\,\cdot\,1\ =\ n\,\cdot\,(n\ -\ 1)!]


so


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \frac{n!}{(n\ -\ 1)!}\ =\ \frac{n\,\cdot\,(n\ -\ 1)!}{(n\ -\ 1)!}\ =\ n]






John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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