南通瑞慈医院有限公司:1/42 1/40 11/42 1/50 ()
来源:百度文库 编辑:杭州交通信息网 时间:2024/04/28 06:38:52
解题过程
111/42
什么意思?说明一点好吗?
1/42 1/40 11/42 1/50 ()
1/30+1/42+1/72+1/90+…1/9900
巧算 1/30+1/42+1/56+1/72+1/90
30/1+42/1+56/1+72/1+90/1=?
一道公务员测试:1/40x41+1/41x42+1/42x43+…+1/49x50的值为:( ) 如何计算?
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=?
20/1+30/1+42/1+56/1+72/1+90/1
1/20+1/30+1/42+1/56+1/72+1/90
-1/42-1/56-1/72-1/90-1/110=?快点!