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为什么有理数 1/49 看起来这么像是个无限不循环小数?循环节在哪里?

2020-05-18科学

打开你的python, 输入:

>>> 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000//49

204081632653061224489795918367346938775510 2040816326530612244897959183673469387755102040816326530612244897959183673469387755102040816326530612244897959183673469387755102040

循环节有了吧?