7/6+13/12+21/20+31/30+43/42+57/56 7/6+13/12+21/20+31/30+43/42+57/56

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 17:36:58
7/6+13/12+21/20+31/30+43/42+57/567/6+13/12+21/20+31/30+43/42+57/567/6+13/12+21/20+31/30+43/42+57/567

7/6+13/12+21/20+31/30+43/42+57/56 7/6+13/12+21/20+31/30+43/42+57/56
7/6+13/12+21/20+31/30+43/42+57/56 7/6+13/12+21/20+31/30+43/42+57/56

7/6+13/12+21/20+31/30+43/42+57/56 7/6+13/12+21/20+31/30+43/42+57/56
7/6+13/12+21/20+31/30+43/42+57/56
=1+1/6+1+1/12+1+1/20+1+1/30+1+1/42+1+1/56
=6+1/(2X3)+1/(3X4)+1/(4X5)+1/(5X6)+1/(6X7)+1/(7X8)
=6+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8
=6+1/2-1/8
=6+3/8
=51/8