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哦,从公式编辑器上拷贝的公式居然也行!真是太方便了 szl6208 发表于 2013-10-1 21:04
回复 szl6208 ge后加qslant:效果: \[{\left( {\sum {{a^2}} - 1} \right)^2} \geqslant 2\left( {\sum ... 其妙 发表于 2013-10-1 23:04
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2025-7-21 11:43 GMT+8
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