1/100+2/100+3/100+4/100+...+49/100+50/100答案是十二又三分之四吗
1+1/2+1/4+1/8+...+1/64+1/128
1/10×11+1/11×12+1/12×13+1/13×14+1/14×151/10×11→1/110我打这个只是希望你们能清楚点别搞错
1/2×4+1/4×6+1/6×8+...+1/46×48+1/48×501/2×4→2×4是分子1/2×4算出来是1/8
1/2001-2/2001-3/2001+4/2001+5/2001-6/2001-7/2001+8/2001+9/2001-...-1998/2001-1999/2001+2000/2001