1/1*2+1/2*3+1/3*4+......1/2004
1\2004+2/2004+3/2004+4\2004+5\2004+……+2002\2004+2003\2004
1/1*2+1/2*3+1/3*4+.+1/2004*2005+1/2005*2006
(1-1/2004)+(2-1/2004*2)+(3-1/2004*3)+.+(2004-1/2004*2004)
简算:1/2004+2/2004+3/2004+4/2004+.+2002/2004+2003/2004
1*2/1+2*3/1+3*4/1+.+2004*2005/1=
1/2*1+1/2*3+1/3*4+.+1/2004*2005=?
(1-1/2-1/3-1/4-……-1/2003)(1/2+1/3+1/4+...+1/2004)-(1-1/2-1/3
1/1*2+1/3*4+1/4*5+...+1/2004*2005+1/2005*2006,
(1-1/2-1/3-1/4..-1/2004)*(1+1/2+1/3+1/4+...+1/2005)-(1-1/2-1
数学题解答|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+…+|1/2004-1/2003|
计算【1/3-1/2】+【1/4-1/3】+【1/5-1/4】+……+【1/2004-1/2003】
化简(1/2+1/3+...1/2003)*(1+1/2+...1/2004)-(1+1/2+...1/2004)*(1