1+1/(1+2)+1/(1+2+3)+……+1/(1+2+3+4+5+6+7+8+9+10)
1/2×4+1/3×5+1/4×6+1/5×7+……+1/8×10+1/9×11
计算:1+1/1+2+1/1+2+3+1/1+2+3+4+…+1/1+2+3+4+5+6+7+8+9+10(过程)
数列2/1+3/1+4/1+5/1+6/1+7/1+8/1+9/1+10/1+11/1……100/1求和
1/1+(1/1+2)+(1/1+2+3)……+(1/1+2+3+4+5+6+7+8+9+10+11)=
一道数学简算题(1/1+2)+(1/1+2+3)+(1/1+2+3+4)+……+(1/1+2+3+4+5+6+7+8+9
1/1×2+1/2×3+1/3×4+1/4×5+1/5×6+1/6×7+1/7×8+1/8×9+1/9×10……1/49
计算题1-1/2-1/3+1/4+1/5-1/6-1/7+1/8+1/9……-1/2006-1/2007+1/2008+
1-1/2+1/3-1/4+1/5-1/6+1/7-1/8+1/9……+1/19-1/20=?
小学奥数拆分:1/(1*2*3*4)-1/(2*3*4*5)-1/(3*4*5*6)-……-1/(6*7*8*9)-1/
1-1/2+1/3+1/4-1/5+1/6+1/7+1/8-1/9……1/n 用C语言写出代码
拓展1+2-3-4+5+6-7-8+9+10-……+1990
1+2-3+4-5+6-7+8-9+10……+998-999+1000=?