来自贾兴红的问题
【|1/10-1/9|+|1/9-1/8|+|1/8-1/7|...+|1/2-1|怎么计算公式】
|1/10-1/9|+|1/9-1/8|+|1/8-1/7|...+|1/2-1|怎么计算公式
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2020-12-25 07:02
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|1/10-1/9|+|1/9-1/8|+|1/8-1/7|...+|1/2-1|
=1/9-1/10+1/8-1/9+1/7-1/8+...+1-1/2
=1-1/10
=9/10
2020-12-25 07:06:26
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