\begin{exercice}
      Soit $n$ un nombre entier naturel. Compl\'{e}ter.
      \begin{colenumerate}{2}
      \item $25 \times {5^6} = {5^{...}}$ 
      \item ${2^n} \times 2 = {2^{...}}$
      \item ${({4^n})^3} = {4^{...}}$
      \item $\dfrac{1}{3} \times {3^n} = {3^{...}}$
      \end{colenumerate}
    \end{exercice}
    \begin{corrige}
      \begin{enumerate}
      \item $25 \times {5^6} = {5^2} \times {5^6} = {5^8}$
      \item ${({4^n})^3} = {4^{3n}}$
      \item ${2^n} \times 2 = {2^n} \times {2^1} = {2^{n + 1}}$
      \item $\dfrac{1}{3} \times {3^n} = \dfrac{3^n}{3^1} = {3^{n - 1}}$
      \end{enumerate}
    \end{corrige}