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@testxlog-3456
testxlog
·
24 days ago
证明无限循环的0.99等于1
方法一
令x=0.99……
则10x=9.99……
10x=9+0.99……
10x=9+x
x=1
方法二
1=3x1/3
1=3x0.33……
1=0.99……
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