1/3+1/15+1/35+1/63+1/99+1/145+1/195+1/255
问题描述:
1/3+1/15+1/35+1/63+1/99+1/145+1/195+1/255
答
1/2(1-1/3+1/3-1/5+1/5-1/7+...1/15-1/17)=8/17
1/3+1/15+1/35+1/63+1/99+1/145+1/195+1/255
1/2(1-1/3+1/3-1/5+1/5-1/7+...1/15-1/17)=8/17