1.(1/2+1/3+…+1/2003)(1+1/2+1/3+…+1/2004)-(1+1/2+1/3+…+1/2003
1.(1/2+1/3+…+1/2003)(1+1/2+1/3+…+1/2004)-(1+1/2+1/3+…+1/2003
计算【1/3-1/2】+【1/4-1/3】+【1/5-1/4】+……+【1/2004-1/2003】
(1-1/2-1/3-1/4-……-1/2003)(1/2+1/3+1/4+...+1/2004)-(1-1/2-1/3
2005-2004+2003-2002+2001……+3-2+1
2005+2004+2003……+3+2+1=?
数学题解答|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+…+|1/2004-1/2003|
1\2004+2/2004+3/2004+4\2004+5\2004+……+2002\2004+2003\2004
(1-1/2)(1/3-1)(1-1/4)(1/5-1)……(1/2003-1)(1-1/2004)
计算:{1\2005-1/2004}+{1/2004-1\2003}+{1/2003-1/2002}+……+{1/3-1
1+2+3+…+2004+2005+2006= 1+3+5+…+2001+2003+2005+2007
(1/2005-1)(1/2004-1)(1/2003-1)…(1/2-1)=?
(1+3+5+……+2003)-(2+4+6+……+2004)=