2/3+1/6+1/9+1/12+1/15+1/18=

来源:学生作业帮助网 编辑:六六作业网 时间:2025/01/23 15:08:41
2/3+1/6+1/9+1/12+1/15+1/18=2/3+1/6+1/9+1/12+1/15+1/18=2/3+1/6+1/9+1/12+1/15+1/18=(1/3)(2+1/2+1/3+1/4

2/3+1/6+1/9+1/12+1/15+1/18=
2/3+1/6+1/9+1/12+1/15+1/18=

2/3+1/6+1/9+1/12+1/15+1/18=
(1/3)(2+1/2+1/3+1/4+1/5+1/6)
=(1/3)(2+1-1/6+1/6+9/20)
=(1/3)(3+9/20)
=(1/3)(69/20)
=23/20

23/20

23/20