Latex Formula

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  • Thread starter temaire
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  • #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]
 

Answers and Replies

  • #2
cristo
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You mean like this: [tex]n \choose r[/tex] or [tex]^n\mathrm{C}_r[/tex] ?
 
Last edited:
  • #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]
 
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  • #4
cristo
Staff Emeritus
Science Advisor
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Ok, how about this then: [tex]_n\mathrm{C}_r \hskip5mm _n\mathrm{P}_r[/tex]
 
  • #5
temaire
279
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Thanks, that's what I needed.:smile:
 
  • #6
temaire
279
0
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.
 

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