1
\documentclass[12pt,a4paper]{article}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{dirtytalk}
\usepackage{blindtext}
\usepackage{graphics}
\usepackage{tgbonum}
\usepackage{tikz}
\usepackage{mathtools}
\usepackage{flexisym}
\usepackage{cite}  
\usepackage{nth}
\usepackage{amsthm}

\begin{document}
$$1,\underbrace{\frac{1}{2^2},\frac{1}{2^2},\frac{1}{2^2},\frac{1}{2^2}}_\text{2^2 times},\frac{1}{6^2},\frac{1}{8^2},\frac{1}{9^2},\frac{1}{10^2},\frac{1}{11^2},\frac{1}{12^2},\frac{1}{13^2},
\underbrace{\frac{1}{14^2},\frac{1}{14^2},\cdots,\frac{1}{14^2}}_\text{ times},\cdots$$
\end{document}

I am trying to write under braces. But it is not coming. Please help

koleygr
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1 Answers1

3

Here is the way:

\documentclass[12pt,a4paper]{article}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{dirtytalk}
\usepackage{blindtext}
\usepackage{graphics}
\usepackage{tgbonum}
\usepackage{tikz}
\usepackage{mathtools}
\usepackage{flexisym}
\usepackage{cite}  
\usepackage{nth}
\usepackage{amsthm}


\begin{document}
\[
1,\underbrace{\frac{1}{2^2},\frac{1}{2^2},\frac{1}{2^2},\frac{1}{2^2}}_{\text{$2^2$ times}},\frac{1}{6^2},\frac{1}{8^2},\frac{1}{9^2},\frac{1}{10^2},\frac{1}{11^2},\frac{1}{12^2},\frac{1}{13^2},
\underbrace{\frac{1}{14^2},\frac{1}{14^2},\cdots,\frac{1}{14^2}}_{\text{ times}},\cdots
\]
\end{document}

PS: you have to place the second argument of \underbrace inside curly braces...

enter image description here

koleygr
  • 20,105
  • 1
    You lost the space between 2^2 and times. Either you write 2^2\text{ times} or (IMO better) \text{$2^2$ times}. – campa Aug 19 '19 at 12:45
  • Just to be extremely fussy: \text would work in a subscript even without braces. But I completely agree that in most cases one must put them. – campa Aug 19 '19 at 13:19
  • @campa ... "should" ... but doesn't... – koleygr Aug 19 '19 at 13:57
  • 1
    @koleygr Excuse me. Could you change your code putting [...] instead of $$...$$? The user have used the double dollars. Thank you very much. – Sebastiano Aug 19 '19 at 15:29
  • 1
    @Sebastiano ... Thanks for this improvement ... I hope that the OP will see your comment and visit here: https://tex.stackexchange.com/questions/503/why-is-preferable-to – koleygr Aug 19 '19 at 15:43