1-1/6+1/42+1/56+1/72+1/90+1/110=
1/42+1/56+1/72+1/90+1/110
42/1+1/56+1/72+1/90+1/110
1/42+1/56+1/72+1/90+1/110+1/132=?
42/1 + 56/1 +72/1 + 90/1 + 110/1 + 132/1=?
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
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/
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
1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110 急!
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=?