Tableaux de variations (4 sens)

Voici son code :

\begin{center}
  \begin{variations}
    x       &\mI&  &       &-1 &       &  &0&  &       & 3 &       &  &\pI\\
    \filet 
    f'(x)   &   & +&       &\bb&       & -&0&+ &       &\bb&       & -&   \\
    \filet 
    \m{f(x)}&\mI&\c&\h{\pI}&\bb&\h{\pI}&\d&5&\c&\h{\pI}&\bb&\h{\pI}&\d&\mI\\
  \end{variations}
\end{center}