作业帮1／6+1／12+1／20+1／30+1／42
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/06 23:54:38
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1／6+1／12+1／20+1／30+1／42
1／6+1／12+1／20+1／30+1／42
1／6+1／12+1／20+1／30+1／42
1／6+1／12+1／20+1／30+1／42
=1/2-1/3+1/3-1/4-1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
5/14
=1/2-1/3+1/3-1/4-1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
详细
