(3n+1)7^n - 1 is divisible by 9
更新1:
我係問(3n+1)7^n - 1 is divisible by 9. 唔係 (3n+1)7n - 1 is divisible by 9 .................. (3+1)7-1=9?????????????? (3+1)7-1=24??????????
我係問(3n+1)7^n - 1 is divisible by 9. 唔係 (3n+1)7n - 1 is divisible by 9 .................. (3+1)7-1=9?????????????? (3+1)7-1=24??????????
收錄日期: 2021-04-23 20:34:58
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https://hk.answers.yahoo.com/question/index?qid=20080909000051KK02290