0.111111.的分数形式是?
问题描述:
0.111111.的分数形式是?
答
把它拆为0.1,0.01,0.001,.的无穷等比数列,则有 S=0.1+0.01+0.001+.=0.1/(1-0.1)=1/9
0.111111.的分数形式是?
把它拆为0.1,0.01,0.001,.的无穷等比数列,则有 S=0.1+0.01+0.001+.=0.1/(1-0.1)=1/9