博文
LaTeX: square root
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% Put the math symbols inside $...\$.
% \sqrt {} square root
Syntax: \$ \sqrt {16} = 4 \$ \$ \sqrt {x^2} = |x| \$
Output: $\sqrt {16} = 4$ $\sqrt {x^2} = |x| $
https://blog.sciencenet.cn/blog-3031432-964270.html
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