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1.纯粹十进制循环小数是指小数0.α_1…α_k,它从小数点后开始出现重复的k个数字.例如:0.243243243…=9/37.混合循环小数0.b_1…b_mα_1…α_k,是指最终出现循环,但不能化为一个纯粹循环小数.例如:0.011363636…=1/88.
1. A pure decimal decimal refers to the decimal point 0.α_1...α_k, which starts from the decimal point with repeating k numbers. For example: 0.243243243...=9/37. The mixed cycle fraction 0.b_1...b_mα_1...α_k is the final value. A loop occurs, but it cannot be reduced to a pure decimal. For example: 0.011363636...=1/88.