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正规数

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hbghlyj posted 2020-1-26 17:37 |Read mode

S是一个正规数集，且S中任意两个数的差不是有限小数
（1）S是否能为无限集
（2）S是否能为不可数集

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• 如何证明0.123456789101112…是无理数

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original poster hbghlyj posted 2020-1-26 17:50

猜测
0.1234567891011...
0.1122334455...
0.111222333...

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