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\[\frac4a+\frac{a^2}{2b}\geqslant\frac4a+\frac{a^2}{1+b^2}=\frac4a+a\geqslant4.\] kuing 发表于 2020-11-23 02:49
$\LaTeX$ formula tutorial Reply post To last page
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2025-7-15 15:01 GMT+8
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