1/3+1/15+1/35+1/63+1/99=?
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/10/03 08:11:11
1/3+1/15+1/35+1/63+1/99=?
1/3+1/15+1/35+1/63+1/99
=1/2[(1-1/3)+(1/3-1/5)+(1/5-1/7)+(1/7-1/9)+(1/9-1/11)]
=1/2(1-1/11)
=1/2×10/11
=5/11 1/3+1/15+1/35+1/63+1/99
=1/2[(1-1/3)+(1/3-1/5)+(1/5-1/7)+(1/7-1/9)+(1/9-1/11)]
=1/2(1-1/11)
=1/2×10/11
1/3+1/15+1/35+1/63+1/99
=1/2[(1-1/3)+(1/3-1/5)+(1/5-1/7)+(1/7-1/9)+(1/9-1/11)]
=1/2(1-1/11)
=1/2×10/11
=5/11 =5/11 1/3+1/15+1/35+1/63+1/99
=1/2[(1-1/3)+(1/3-1/5)+(1/5-1/7)+(1/7-1/9)+(1/9-1/11)]
=1/2(1-1/11)
=1/2×10/11
1/3+1/15+1/35+1/63+1/99
=1/2[(1-1/3)+(1/3-1/5)+(1/5-1/7)+(1/7-1/9)+(1/9-1/11)]
=1/2(1-1/11)
=1/2×10/11
=5/11 =5/11
=1/2[(1-1/3)+(1/3-1/5)+(1/5-1/7)+(1/7-1/9)+(1/9-1/11)]
=1/2(1-1/11)
=1/2×10/11
=5/11 1/3+1/15+1/35+1/63+1/99
=1/2[(1-1/3)+(1/3-1/5)+(1/5-1/7)+(1/7-1/9)+(1/9-1/11)]
=1/2(1-1/11)
=1/2×10/11
1/3+1/15+1/35+1/63+1/99
=1/2[(1-1/3)+(1/3-1/5)+(1/5-1/7)+(1/7-1/9)+(1/9-1/11)]
=1/2(1-1/11)
=1/2×10/11
=5/11 =5/11 1/3+1/15+1/35+1/63+1/99
=1/2[(1-1/3)+(1/3-1/5)+(1/5-1/7)+(1/7-1/9)+(1/9-1/11)]
=1/2(1-1/11)
=1/2×10/11
1/3+1/15+1/35+1/63+1/99
=1/2[(1-1/3)+(1/3-1/5)+(1/5-1/7)+(1/7-1/9)+(1/9-1/11)]
=1/2(1-1/11)
=1/2×10/11
=5/11 =5/11
1/3+1/15+1/35+1/63+1/99
1\3+1\15+1\35+1\63+1\99
简算:3/1+15/1+35/1+63/1+99/1+143/1+195/1=?
1-1/3-1/15-1/35-1/63-1/99=?
1/3+1/15+1/35+1/63+/1+1/99=?
1/3+1/15+1/35+1/63+1/99+1/143=?怎样简便计算?
3/1+15/1+35/1+63/1+99/1=?(裂项法计算)
裂项求和法1/3+1/15+1/35+1/63+1/99=?
3分之1+15分之1+35分之1+63分之1+99分之1=( )
1/3+1/15+1/35+1/63+1/99=?
1/3+1/15+1/35+1/63+1/99+1/145+1/195+1/255
1/15+1/35+1/63+1/99+1/143