[Tex/LaTex] How to get a square root looking like this?

math-modemath-operators

How can I get a square root looking like these in LaTeX? Thanks!

[new picture]

Best Answer

I guess you are looking for the services of the newtxmath math font package. Note that if you use it, you should probably also use the companion newtxtext text font package. Do check, though, if you want to (or are allowed to) use a Times Roman clone for your document.

\documentclass{article}
\usepackage{newtxtext,newtxmath}
\begin{document}
$\sqrt{x}$
\end{document}

Related Solutions

[Tex/LaTex] How to standardize the square root signs

In general, you can't standardise this: the over-large ones have to be straight as TeX can not stretch otherwise, for smaller sizes it depends on the font in use, the shape, and how many designed sizes there are is controlled by the font not TeX.

Almost all fonts will use a slanted design for the designed glyphs before TeX falls back to the straight extender, so one way to standardise on sloping design unless you have really tall entries is to use a font that has more sizes of designed sqrt size than the original cm fonts. The yhmath font is one such font:

enter image description here

\documentclass{article}
\usepackage{amsmath,yhmath}
\begin{document}

(1)
\[\Delta F_0 = \sqrt{\sum_{i=1}^n\left(\frac{\delta F_0}{\delta x_i}\Delta x_i\right)^2}\]


(2)
\[\Delta F_0 = \sqrt{6.044 \cdot 10^{-6}\text{m}^2}\]

\end{document}

[Tex/LaTex] Root within square root symbol

It's the usual problem due to the setting of the math extension font done by lmodern.sty, which defines OMX/lmex/m/n for it with this completely wrong font definition file:

\ProvidesFile{omxlmex.fd}[2009/10/30 v1.6 Font defs for Latin Modern]

\DeclareFontFamily{OMX}{lmex}{}
\DeclareFontShape{OMX}{lmex}{m}{n}{%
   <->sfixed*lmex10%
   }{}
\endinput

This means that lmex10 is used no matter what the surrounding font size is. This might seem to work at standard sizes (it doesn't, however, try with \sum in a subscript).

I usually suggest to reinstate the Computer Modern math extension font, but applying the fact that nowadays arbitrary scaling is possible.

\documentclass[a4paper,fontsize=14pt]{scrbook}
\usepackage{mathtools}
\usepackage{lmodern}

\DeclareFontShape{OMX}{cmex}{m}{n}{%
  <-7.5>cmex7
  <7.5-8.5>cmex8
  <8.5-9.5>cmex9
  <9.5->cmex10
}{}
\DeclareSymbolFont{largesymbols}{OMX}{cmex}{m}{n}


\begin{document}
\[
a = \sqrt[m]{\sum_{i=1}^{n}b_{i}^m}.
\]
\end{document}