File: factorial

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!!abstract,linked gloses,internal links,content,dynamic examples,...
!set gl_author=Euler, Acadmie de Versailles
!set gl_keywords=combinatorics,factorial
!set gl_title=Factorielle
!set gl_level=H6 Gnrale Spcialit
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<div class="wims_defn">
  <h4>Dfinition</h4>
  Soit \(n\) un entier naturel.
  <br>
  On appelle <strong>factorielle</strong> de \(n\) le nombre not \(n!\) dfini
  par&nbsp;:
  <ul>
    <li>
    \(0!=1\)
    </li><li>
    et pour tout <span class ="nowrap">\(n\in\NN\),</span> <span class ="nowrap">\((n+1)!=(n+1)\times n!\).</span>
    </li>
  </ul>
</div>
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<div class="wims_thm">
  <h4>Thorme</h4>
  Pour tout entier naturel \(n\) tel que <span class ="nowrap">\(n \geqslant 2\),</span>
  <span class ="nowrap">
  \(n! = 1 \times 2 \times \ldots \times (n-1) \times n\).</span>

</div>