1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110=?
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/10/06 09:06:56
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110=?
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110 =1/(1X2)+1/(2X3)+1/(3X4)+1/(4X5)+1/(5X6)+1/(6X7)+1/(7X8)+1/(8X9)+1/(9X10)+1/(10X11) =(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+···+(1/10-1/11) =1-1/11 =10/11
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110
若a=1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110+1/132+1/
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+1/110+1/132=
2\1+6\1+12\1+20\1+30\1+42\1+56\1+72\1+90\1+110\1+132\1=?
计算1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110=?
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110=?用简便运算!
求解小学数学题1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110=?
2/1+6/1+12/1+20/1+30/1+42/1+56/1+72/1+90/1+110/1=?
2/1+6/1+12/1+20/1+30/1+42/1+56/1+72/1+90/1+110/1=几分之几
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110=?
1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110 急!