1

This question already has an answer here:

This is what I want to write:

enter image description here

Apparently, the following doesn't work

\sqrt[ \sqrt[\log n]{n} ]{x}

The error is that the argument of \sqrt has an extra }. This seems like a bug to me. Is there a way to write this symbol?

marked as duplicate by Schweinebacke, egreg, Community Mar 30 '17 at 17:51

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  • It should be \sqrt[{\sqrt[\log n]{n}}]{x}, but are you sure you want that monster? – egreg Mar 30 '17 at 17:35
5

Put the second \sqrt into {...}.

Edit: I've added a possible alternative to the monster.

\documentclass{article} 
\usepackage{mathtools} 
\begin{document} 
    \[ 
    \sqrt[{\sqrt[\log n]{n}}]{x} 
    \]
I prefer this possibile alternative:
    \[
    {x}^{{\bigl[{n}^{{(\log n)}^{-1}}\bigr]^{-1}}}
    \]
\end{document}

enter image description here

  • That's it. Should have thought about that! Thanks! – Nikos Mar 30 '17 at 17:37
  • I know of this alternative, but i wanted to specifically emphasize the root sign. Your original answer is perfectly fine. This one is a welcome addition of course. – Nikos Mar 30 '17 at 20:28
  • 1
    @RestlessC0bra There's a reason for creating the monster, then, hahaha! – CarLaTeX Mar 30 '17 at 20:30

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