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Latex Formula

  1. May 14, 2008 #1

    temaire

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    How do you write the permutation and combination formulas using latex. This is the best I can do:

    [tex]n_P_r=\frac{n!}{(n-r)!}[/tex]
     
    temaire, May 14, 2008
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  3. May 14, 2008 #2

    cristo

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    You mean like this: [tex]n \choose r[/tex] or [tex]^n\mathrm{C}_r[/tex] ?
     
    Last edited: May 14, 2008
    cristo, May 14, 2008
  4. May 14, 2008 #3

    temaire

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    Yes, that's what I meant, but I am used to writing down like this:

    http://img88.imageshack.us/img88/7682/formula2nj1.png [Broken]
     
    Last edited by a moderator: May 3, 2017
    temaire, May 14, 2008
  5. May 14, 2008 #4

    cristo

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    Ok, how about this then: [tex]_n\mathrm{C}_r \hskip5mm _n\mathrm{P}_r[/tex]
     
    cristo, May 14, 2008
  6. May 14, 2008 #5

    temaire

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    Thanks, that's what I needed.:smile:
     
    temaire, May 14, 2008
  7. May 14, 2008 #6

    temaire

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    Out of curiosity, are you good at perms. and combs.? Because I have a question on the the Precalc. forum that hasn't been answered yet. If not, it's ok, because I can wait.
     
    temaire, May 14, 2008
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