File: exer7-16.tex

package info (click to toggle)
texlive-doc 2009-2
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 192,004 kB
  • ctags: 4,774
  • sloc: perl: 12,760; xml: 11,870; makefile: 1,033; lisp: 394; sh: 229; awk: 205; java: 159; sed: 4
file content (11 lines) | stat: -rw-r--r-- 304 bytes parent folder | download | duplicates (12) 
1
2
3
4
5
6
7
8
9
10
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}