1/2+1/6+1/12+...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+156\1
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+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=?
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110+1/132
1/2加1/6加1/12.加1/90加1/110加1/132等于多少?
简算(要有过程)(1)1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110+1/132(2)
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+30\1+42\1+56\1+72\1+90\1+110\1= (提示:2\1=1-2\1.6
1/2+1/6+1/12+……+1/110
1/42+1/56+1/72+1/90+1/110+1/132=?
数学题1/42+1/56+1/78+1/90+1/110+1/132计算过程、得数!