Equações Matemáticas

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Janderson Carvalho

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Feb 8, 2023, 6:12:16 PMFeb 8
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Existe código para fazer esse "círculo" que destaca a equação?
image.png
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Atenciosamente,            
Janderson Carvalho 
Licenciado em Matemática / Universidade Estadual de Montes Claros - UNIMONTES

Emílio Kavamura

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Feb 8, 2023, 8:00:59 PMFeb 8
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Exatamente esta ferramenta eu não conheço, mas tem o zoom do tikz

https://tex.stackexchange.com/questions/59705/magnifying-part-of-a-picture-similar-to-tikz-spy-library

Emílio Kavamura

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Feb 8, 2023, 9:09:01 PMFeb 8
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\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{spy}

\begin{document}
    \begin{tikzpicture}[spy using outlines={circle,yellow,magnification=5,size=.5cm, connect spies}]
        \node {\pgfimage[height=2cm]{tux}};
        \spy on (0,0.01) in node [left] at (1,.5);
    \end{tikzpicture}

    \begin{tikzpicture}[spy using outlines={circle,yellow,magnification=2,size=.5cm, connect spies}]
        \node {$x^2+y^3+ \int\limits_0^a dx$};
        \spy on (-.05,0.15) in node [left, fill = white, opacity=.8] at (0.27,0.25);
    \end{tikzpicture}

\end{document}

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