|1/2004-1/2003|+|1/2003-1/2002|+……+|1/1003-1/1002|
|1/2004-1/2003|+|1/2003-1/2002|+……+|1/1003-1/1002|
计算:{1\2005-1/2004}+{1/2004-1\2003}+{1/2003-1/2002}+……+{1/3-1
1\2004+2/2004+3/2004+4\2004+5\2004+……+2002\2004+2003\2004
计算:2004-2003+2002-2001……+2-1
2005-2004+2003-2002+2001……+3-2+1
2003+2002*2004分之2003*2004-1
2002/2002又2002/2003+1/2004
2004×2003-2003×2002+2002×2001-2001×2000+…+2×1= 递等式计算
计算题:2004*2003-2003*2002+2002*2001-2001*2000+…+2*1=?如题
|1/2003—1/2002|+|1/2004—1/2003|—|1/2004—1/2003|
|1/2004-1/2003|+|1/2003-1/2002|+|1/2002-1/2001|+|1/2001-1/20
化简:|1/2004-1/2003|+|1/2003-1/2002|+|1/2002-1/2001|-|1/2001-1