趣味的数学-356
把循环小数
0.363636...
写成分数。
A piece of cake!
0.363636....
= 36/100 + 36/10000 + 36/1000000 + ....
= 36/100 [ 1 + 1/100 + (1/100)^2 + ..... ]
= 36/100 [ 1/(1-1/100)]
= 4/11