18.16 Mathematical methods and models in economics

condition: For the function \( y(x)=\frac{c x^{-k} e^{-k x}}{\ln (k x)} \) it is required: a) find the elasticity of the function \( y(x) \); b) determine whether \( y(x) \) is elastic when \( x=1 \). \begin{tabular}{|c|c|} \hline\( c \) & \( k \) \\ \hline 3 & 16 \\ \hline \end{tabular}