1/3+1/15+1/35+……1/399+1/483=
问题描述:
1/3+1/15+1/35+……1/399+1/483=
答
=1/2*(1-1/3+1/3-1/5+1/5-1/7+...+1/21-1/23)=11/23
1/3+1/15+1/35+……1/399+1/483=
=1/2*(1-1/3+1/3-1/5+1/5-1/7+...+1/21-1/23)=11/23