testxlog

testxlog

证明无限循环的0.99等于1

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……

photo by Bozhin Karaivanov(https://unsplash.com/@bkaraivanov?utm_source=templater_proxy&utm_medium=referral&fit=crop&mask=corners) on Unsplash

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