计算1/110+1/132+1/156+1/182+1/210+1/240

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/04 14:55:48
计算1/110+1/132+1/156+1/182+1/210+1/240

计算1/110+1/132+1/156+1/182+1/210+1/240
计算1/110+1/132+1/156+1/182+1/210+1/240

计算1/110+1/132+1/156+1/182+1/210+1/240
110=11*10
132=12*11
156=13*12
...
原式=1/10-1/11+1/11-1/12+1/12-1/13...1/15-1/16
=1/10-1/16
=3/80

原式=1\10*11+1\11*12+1\12*13+1\13*14+1\14*15+1\15*16
=1\10-1\16
=3\80

1/110+1/132+1/156+1/182+1/210+1/240
=1/10*11+1/11*12+1/12*13+1/13*14+1/14*15+1/15*16
=1/10-1/11+1/11-1/12+1/12-1/13+1*13-1/14+1/14-1/15+1/15-1/16
=1/10-1/16
=3/80