自然对数ln2值，等于1-1/2+1/3-1/4+1/5……, Bar 數學, Purasbar

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	Floor 1 巨大八爪鱼 2/15/25 9:02
	Floor 2 巨大八爪鱼 2/15/25 9:04 1-1/2+1/3-1/4+1/5……=ln2 就是不同分数单位的分数交替相加减的结果。