作业帮1/15+1/35+1/63+1/99+1/143=
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/16 07:18:54
1/15+1/35+1/63+1/99+1/143=
1/15+1/35+1/63+1/99+1/143=
1/15+1/35+1/63+1/99+1/143=
1/15+1/35+1/63+1/99+1/143
={[(1/3)-(1/5)]/2}+{[(1/5)-(1/7)]/2}+{[(1/7)-(1/9)]/2}+{[(1/9)-(1/11)]/2}+{[(1/11)-(1/13)]/2}
=[(1/3)-(1/5)+(1/5)-(1/7)+(1/7)-(1/9)+(1/9)-(1/11)+(1/11)-(1/13)]/2
=[(1/3)-(1/13)]/2
=(10/39)/2
=5/39