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Answer» eading egreg's comment, CHANGING from \SQRT[3]{x} to \root 3 \of{x}, to indicate using plain TeX, not LaTeXConsider $$\sqrt{x}$$ VS $$\root 3 \of{x}$$.The latter has a 'root' of 3.How do we typeset this?On page 443 of the TeX Book, rule 11, it describes typesetting the radical atom: \radcal and \sqrt. However, it only describes "root-less" types, like \sqrt{x}, and not the ones with a root, like \root 3 \of{x} |
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