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?1????8??: 1/8 1/4 3/8 1/2 5/8 3/4 7/8 ??? This is an arithmetic sequence since there is a common difference between each term. In this case adding 18 to the previous term in the sequence gives the next term. In other words an=a1+d (n?1). Arithmetic Sequence: d=1/8
https://www.zhihu.com/question/651291047
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