1/2+1/4+8/1+……+1/2048简算
问题描述:
1/2+1/4+8/1+……+1/2048简算
答
1/2+1/4+1/8+·········+1/2048
=1/2+(1/2-1/4)+(1/4-1/8)+······(1/1024-1/2048)
=1/2+1/2-1/2048
=1-1/2048
=2047/2048