# Increase the size of derivative

\documentclass{article}
\usepackage[utf8]{inputenc}
\begin{document}
The vertical differential velocity is

$\delta v_2 = v_{2C} - v_{2A} = v_2(x + \delta x , y) - v_2(x,y) \approx \delta x \frac{\partial v_2}{\partial x}$.
\end{document}


How can I make the derivative appears larger rather than having the same size as the words in the sentence?

Thanks!

• \displaystyle\frac{\partial v_2}{\partial x}, the key being \displaystyle. Feb 7, 2018 at 11:49
• If you're comfortable with inline-style fraction notation, write (\partial v_2/\partial x) instead of frac{\partial v_2}{\partial x}.
– Mico
Feb 7, 2018 at 11:52
• With \dfrac you get what you'd like, but you spoil the line spacing. Feb 7, 2018 at 12:26
• do you really want that expression to be inline math?? (I would remove the blank line before the equation and then replace $...$ by $...$ Feb 7, 2018 at 12:32

Normally such a large expression should be set as a display math environment, not as a paragraph using inline math: \documentclass{article}
\usepackage[utf8]{inputenc}
\begin{document}

\section{inline}

The vertical differential velocity is

$\delta v_2 = v_{2C} - v_{2A} = v_2(x + \delta x , y) - v_2(x,y) \approx \delta x \frac{\partial v_2}{\partial x}$.

\section{display}

The vertical differential velocity is
$\delta v_2 = v_{2C} - v_{2A} = v_2(x + \delta x , y) - v_2(x,y) \approx \delta x \frac{\partial v_2}{\partial x} \mbox{.}$

\end{document}