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Instead of summing them and dividing by M, I multiply them all together and take the nth root of them. 我把所有的乘在一起然後開(kāi)n次方,而不是把他們加縂再除以個(gè)數(shù) 耶魯公開(kāi)課 - 金融市場(chǎng)課程節(jié)選