1/3×5 +1/5×7 + 1/7×9 + …+ 1/99×100
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/16 08:37:42
1/3×5+1/5×7+1/7×9+…+1/99×1001/3×5+1/5×7+1/7×9+…+1/99×1001/3×5+1/5×7+1/7×9+…+1/99×1001/3×5+1/5×7+1/7×
1/3×5 +1/5×7 + 1/7×9 + …+ 1/99×100
1/3×5 +1/5×7 + 1/7×9 + …+ 1/99×100
1/3×5 +1/5×7 + 1/7×9 + …+ 1/99×100
1/3×5 +1/5×7 + 1/7×9 + …+ 1/99×101
=1/2×(1/3-1/5)+1/2×(1/5-1/7)+……+1/2×(1/99-1/101)
=1/2×(1/3-1/5+1/5-1/7……1/99-1/101)
=1/2×(1/3-1/101)
=49/303
分母是3*5还是3啊
55555555555
楼主说清楚啊
1/2*(1/3-1/5+1/5-1/7+...+1/98-1/99+1/99-1/100)=97/600
(1+1/3+1/5+1/7)*(1/3+1/5+1/7+1/9)-(1+1/3+1/5+1/7+1/9)*(1/3+1/5+1/7) 简算(1+1/3+1/5+1/7)*(1/3+1/5+1/7+1/9)-(1+1/3+1/5+1/7+1/9)*(1/3+1/5+1/7) 简便计算
简算:1/1*3+1/3*5+1/5*7+1/7*9+1/9*11
(1*3)/1+(3*5)/1+(5*7)/1+(7*9)/1+(9*11)/1
1/1*3+1/3*5+1/5*7+1/7*9+1/9*11
(1*3)/1+(3*5)/1+(5*7)/1+(7*9)/1+(9*11)/1
1+1+3+5+7+9
(1/3+1/5+1/7)*(1/5+1/7+1/9)-(1/3+1/5+1/7+1/9)*(1/5+1/7)=?
1/1*3+1/3*5+1/5*7+1/7*9+...1/17*19=
计算1/(1×3)+1/(3×5)+1/(5×7)+1/(7×9)+.+1/(19×21)
1/1×3+1/3×5+1/5×7+1/7×9+.+1/2013×2015
1/1*3+1/3*5+1/5*7+1/7*9+.+1/101*103
帮帮忙1/1*3+1/3*5+1/5*7+1/7*9+...1/99*101
1/1*3+1/3*5+1/5*7+1/7*9+1/49*51=
计算：1/1×3+1/3×5+1/5×7+1/7×9``````+1/2001×2003
1/1*3+1/3*5+1/5*7+1/7*9+.+1/49*51
1/1*3+1/3*5+1/5*7+1/7*9+...+1/2007*2009=?
1/1*3+1/3*5+1/5*7+1/7*9+.+1/2003*2005
-1/1*3-1/3*5-1/5*7-1/7*9-^-1/19*21