1/6+1/12+1/20+1/30+1/42+1/56+1/72=?
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/08/15 21:04:22
1/6+1/12+1/20+1/30+1/42+1/56+1/72=?
![1/6+1/12+1/20+1/30+1/42+1/56+1/72=?](/uploads/image/z/18876755-11-5.jpg?t=1%2F6%2B1%2F12%2B1%2F20%2B1%2F30%2B1%2F42%2B1%2F56%2B1%2F72%3D%3F)
裂项法:
原式=(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+...+(1/8-1/9)
=1/2-1/3+1/3-1/4+...+1/8-1/9
=1/2-1/9
=7/18;
如果本题有什么不明白可以追问,如果满意记得采纳
如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢.
祝学习进步
原式=(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+...+(1/8-1/9)
=1/2-1/3+1/3-1/4+...+1/8-1/9
=1/2-1/9
=7/18;
如果本题有什么不明白可以追问,如果满意记得采纳
如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢.
祝学习进步
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+190+1/110=?
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=多少
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=______
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+.1/9900=?
1/6+1/12+1/20+1/30+1/42+1/56+1/72 简便计算
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=?
1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=?
1/12+1/20+1/30+1/42+1/56+1/72+1/90=?
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+.1/9900
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/10