1/14*15+1/15*16+1/16*17+1/17*18

来源：学生作业帮助网 编辑：六六作业网 时间：2024/05/10 04:44:32
1/14*15+1/15*16+1/16*17+1/17*181/14*15+1/15*16+1/16*17+1/17*181/14*15+1/15*16+1/16*17+1/17*181/(14*1

1/14*15+1/15*16+1/16*17+1/17*18
1/14*15+1/15*16+1/16*17+1/17*18

1/14*15+1/15*16+1/16*17+1/17*18
1/(14*15)+1/(15*16)+1/(16*17)+1/(17*18)
=1/14-1/15+1/15-1/16+1/16-1/17+1/17-1/18
=1/14-1/18
=1/63