1+1/2+1/6+1/12+1/20+1/30.+1/901+1/2+1/6+1/12+1/20+1/30+.+1/90简便计算
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 15:34:49
![1+1/2+1/6+1/12+1/20+1/30.+1/901+1/2+1/6+1/12+1/20+1/30+.+1/90简便计算](/uploads/image/z/967166-62-6.jpg?t=1%2B1%2F2%2B1%2F6%2B1%2F12%2B1%2F20%2B1%2F30.%2B1%2F901%2B1%2F2%2B1%2F6%2B1%2F12%2B1%2F20%2B1%2F30%2B.%2B1%2F90%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
1+1/2+1/6+1/12+1/20+1/30.+1/901+1/2+1/6+1/12+1/20+1/30+.+1/90简便计算
1+1/2+1/6+1/12+1/20+1/30.+1/90
1+1/2+1/6+1/12+1/20+1/30+.+1/90简便计算
1+1/2+1/6+1/12+1/20+1/30.+1/901+1/2+1/6+1/12+1/20+1/30+.+1/90简便计算
1+1/2+1/6+1/12+1/20+1/30+.+1/90
=1+1-1/2+1/2-1/3+1/3-1/4+.+1/9-1/10
=2-1/10
=1又9/10