2

With this my equation:

\begin{equation} \label{eq:new-ri}
\tilde{RI} = \frac{RI(v)}{\hat{q}v^\gamma},
\end{equation}

I have this result:

Tilde

QUESTION: Is possible obtain a more large tilde which covers all the variable {RI}?

7

Try:

\documentclass[a4paper,12pt]{article}
    \usepackage{amsmath}
\begin{document}
\begin{equation} \label{eq:new-ri}
\widetilde{RI} = \frac{RI(v)}{\hat{q}v^\gamma},
\end{equation}
\end{document} 

enter image description here

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