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Diffstat (limited to 'Master/texmf-dist/doc/latex/guide-to-latex/exercises/chap7/exer7-16.tex')
-rw-r--r-- | Master/texmf-dist/doc/latex/guide-to-latex/exercises/chap7/exer7-16.tex | 11 |
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diff --git a/Master/texmf-dist/doc/latex/guide-to-latex/exercises/chap7/exer7-16.tex b/Master/texmf-dist/doc/latex/guide-to-latex/exercises/chap7/exer7-16.tex new file mode 100644 index 00000000000..e603633e6a6 --- /dev/null +++ b/Master/texmf-dist/doc/latex/guide-to-latex/exercises/chap7/exer7-16.tex @@ -0,0 +1,11 @@ +\documentclass{article} +\begin{document} +\noindent +The total number of permutations of $n$ elements taken $m$ at a time +(symbol $V_n^m$) is +\vspace{-0.5ex} +\[ V_n^m = \prod_{i=0}^{m-1}(n-i) = + \underbrace{n(n-1)(n-2)\ldots(n-m+1)}_{\mbox{total of $m$ factors}} = + \frac{n!}{(n-m)!} \] +\end{document} + |