- #1
temaire
- 275
- 0
How do you write the permutation and combination formulas using latex. This is the best I can do:
n_P_r=\frac{n!}{(n-r)!}
n_P_r=\frac{n!}{(n-r)!}
Write the permutation and combination formulas using latex
- Context: LaTeX
- Thread starter temaire
- Start date
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Discussion Overview
The discussion focuses on how to write the permutation and combination formulas using LaTeX. Participants share their attempts and preferences for notation, exploring different representations.
Discussion Character
- Technical explanation
Main Points Raised
- One participant presents the permutation formula as n_P_r=\frac{n!}{(n-r)!}.
- Another participant suggests using the notation n \choose r or ^n\mathrm{C}_r for combinations.
- A participant expresses a preference for a specific visual representation of the formulas, referencing an external image.
- Another participant proposes the notation _n\mathrm{C}_r \hskip5mm _n\mathrm{P}_r as an alternative format.
- One participant expresses gratitude for the information provided.
- A later reply inquires about the participants' expertise in permutations and combinations, indicating a desire for further discussion on related questions.
Areas of Agreement / Disagreement
Participants share various notations for permutations and combinations, but there is no consensus on a single preferred format. The discussion remains open to different representations.
Contextual Notes
Some participants reference specific visual formats and external images, which may not be universally accessible or understood without context.
- #2
cristo
Staff Emeritus
Science Advisor
- 8,145
- 75
You mean like this: n \choose r or ^n\mathrm{C}_r ?
Last edited:
- #3
temaire
- 275
- 0
Yes, that's what I meant, but I am used to writing down like this:
http://img88.imageshack.us/img88/7682/formula2nj1.png
http://img88.imageshack.us/img88/7682/formula2nj1.png
Last edited by a moderator:
- #4
cristo
Staff Emeritus
Science Advisor
- 8,145
- 75
Ok, how about this then: _n\mathrm{C}_r \hskip5mm _n\mathrm{P}_r
- #5
temaire
- 275
- 0
Thanks, that's what I needed.
- #6
temaire
- 275
- 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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