来自包斯琴的问题
1/2+1/4+1/8+……+1/2n次方的值
1/2+1/4+1/8+……+1/2n次方的值
1回答
2020-01-20 08:19
1/2+1/4+1/8+……+1/2n次方的值
1/2+1/4+1/8+……+1/2n次方的值
简单啊看
1/2+1/4+1/8……+1/2^n
=(1-1/2)+(1/2-1/4)……
=1-1/2n