计算1/3+1/8+1/15+...+1/120
4个回答
1/1*3+1/2*4+1/3*5+.
=1/2(1-1/3+1/3-1/5+.+1/10-1/12)
=1/2(1-1/12)
=11/24
相关问题
1/3+1/8+1/15+......1/120=?
简算 1/3+1/8+1/15+.+1/120
1/3+1/8+1/15+……+1/120=?答对有奖
计算:(1+[1/3])(1+[1/8])(1+[1/15])…(1+[1/99])=______.
简便计算:1/8+1/24+1/48+1/120
计算11/8+1/24+1/48+1/80+1/120
简算 1/3+1/15+.+1/120
计算:1.25*(88+6/15)*8+8*3/5*(1+1/4)-125%*(78+2/3)*8
(1/8+1/24+1/48+1/80+1/120+1/168)简便计算
计算:1x2+2x3+3x4+……+49x50 计算:(1-3/8)+(1-3/15)+(1-3