(1/2+1/3+.+1/2000+1/2001)-(1+1/2+1/3+..+1/2001)(1/2+1/3+...+
计算1001-1/2001-2/2001-3/2001-...-2001/2001
2002*2001-2001*2000+2000*1999-.-3*2+2*1
1/1*2+1/2*3+1/3*4+...+1/2000*1/2001=
2003-2002+2001-2000+.+3-2+1
1+2+3+...+1999+2000+2001+2002
1/2001+2/2001+3/2001...+4000/2001+4001/2001
1/1*2+1/2*3+1/3*4+.1/2000*2001
数学计算题:2003 1/2-2002 1/3+2001 1/2-2000 1/3```+1 1/2-1/3
2001*2001-2000*2000+1999*1999-1998*1998.+3*3-2*2-1*1
(1-1/2001)+(1-2/2001)+(1-3/2001)+······+(1-1999/2001)+(1-200
(1^2+2^2)/1*2+(2^2+3^2)/2*3+...+(2000^2+2001^2)/2000*2001+(2
1/2+1/3+1/4+1/5+1/6+1/7+……+1/2000+1/2001