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3 = log28
2襯 3覯 螻燕覃 8 .
1 = log22
2襯 1覯 螻燕覃 2螳 .
8 = log22 + log22 + log22
log22 + log22 + log22 = 2 * 2 * 2 螳 . 襦蠏碁ゼ 豬 覃 螻煙 . 讀, 襦蠏碁 螻煙 朱 一壱 蟆 伎. 讀, select sum(log(x)) from tableA 螳 蠍一.
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